1. (a) A logic circuit is designed for controlling the lift doors and they should close (Y) if:
(i) the master switch (W) is on AND either
(ii) a call (X) is received from any other floor, OR
(iii) the doors (Y) have been open for more than 10 seconds, OR
(iv) the selector push within the lift (Z) is pressed for another floor. Devise a logic circuit to meet these requirements.
(8 marks) (b) Use logic circuit derived in part (a) and provide the 2-input NAND gate only implementation of the
expression. Show necessary steps.
(c) Use K-map to simplify the following Canonical SOP expression.
(,,,) = ∑(,,,,,,,,,)
Answers
A logic circuit is an electronic circuit that performs logical operations based on input signals to generate desired output signals, following the principles of Boolean logic.
(a) To design a logic circuit for controlling the lift doors based on the given requirements, we can use a combination of logic gates. The circuit should close the doors if any of the following conditions are met: the master switch is on (W = 1) and there is a call from any other floor (X = 1), or the doors have been open for more than 10 seconds (Y = 1), or the selector push within the lift is pressed for another floor (Z = 1). By connecting these inputs to appropriate logic gates, such as AND gates and OR gates, we can design a circuit that satisfies the given conditions.(b) To implement the expression using only 2-input NAND gates, we can follow the De Morgan's theorem and logic gate transformation rules.
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Related Questions
Consider a sphere with diameter of 10 mm, rho=3000 kg/m3 , k=20 w/mo C, C=1 kJ/Kg- o C and α=6.66*10-6 m2 /s, which is initially at 400o C. Then it is quenched in an air stream of 20 o C. Convection heat transfer coefficient, between air and the surface of the sphere, is h=10 W/m2 - o C. • Calculate the time required for the center of the sphere to reach 335 o C? • Now the sphere is moved to a large bath of water at 20 o C. The heat transfer coefficient between water and the surface of sphere is assumed to be 6000 W/m2 - o C. Estimate the time required for the center of the sphere to reach 50o C?
Answers
To calculate the time required for the center of the sphere to reach 335 o C, we need to use the following formula:
()=∞+(0−∞)−ℎ/
where T(t) is the temperature at time t, T0 is the initial temperature, T∞ is the temperature of the surrounding fluid, h is the convective heat transfer coefficient, A is the surface area of the sphere, m is the mass of the sphere, c is the specific heat of the sphere material, and t is time.
Using the given values, we can calculate the time required for the center of the sphere to reach 335 o C:
A = πd^2/4 = 7.85x10^-5 m^2
m = ρV = (4/3)π(d/2)^3ρ = 1.178 kg
t = (1/α) ln[(T0 - T∞)/(T(t) - T∞)] = 79.26 seconds
To estimate the time required for the center of the sphere to reach 50 o C in the water bath, we use the same formula, but with a different value of h:
h = 6000 W/m^2-°C
T∞ = 20 °C
T0 = 335 °C
m = 1.178 kg
c = 1000 J/kg-°C (since C = 1 kJ/kg-°C)
T(t) = 50 °C
t = (1/α) ln[(T0 - T∞)/(T(t) - T∞)] = 242.18 seconds
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When E = 14 V and R = 1 Ω, the current is _________ amperes.
When E = 14 V and R = 4 Ω, the current is _________ amperes.
When E = 14 V and R = 8 Ω, the current is _________ amperes.
When E = 14 V and R = 12 Ω, the current is _________ amperes.
Answers
Answer:
When E = 14 V and R = 1 Ω, the current is 14 A.
When E = 14 V and R = 4 Ω, the current is 3.5 A.
When E = 14 V and R = 8 Ω, the current is 1.75 A.
When E = 14 V and R = 12 Ω, the current is 1.166... A
(rounded to three decimal places).
Explanation:
To calculate the current (I) using Ohm's law, we can use the formula:
I = E / R
where I is the current in amperes (A), E is the voltage in volts (V), and R is the resistance in ohms (Ω).
Answer:
Current = Emf / Resistance
When E = 14 V and R = 1 Ω, the current is 14/1 amperes = 14 amp
When E = 14 V and R = 4 Ω, the current is 14/4 amperes = 3.5 amp
When E = 14 V and R = 8 Ω, the current is 14 / 8 amperes = 1.75 amp
When E = 14 V and R = 12 Ω, the current is 14 / 12 amperes = 1.16 amp
When will the following loop terminate? while keep_on_going != 999: when keep_on_going refers to a value equal to 999 when keep_on_going refers to a value less than 999 when keep_on_going refers to a value not equal to 999 when keep_on_going refers to a value greater than 999 stion 15 When a piece of data is read from a file, it is copied from the file into the program. True False Question 16 What does the following program do? student = 1 while student <= 3: total 0 for score in range(1, 4): score = int(input ("Enter test score: ")) total += score average = total/3 print("Student ", student, "average: ", average) student 1 It accepts one test score for each of 3 students and outputs the average of the 3 scores. It accepts 3 test scores for each of 3 students and outputs the average for each student. It accepts 4 test scores for 2 students, then averages and outputs all the scores. It accepts 4 test scores for 3 students and outputs the average of the 12 scores. stion 17 A value-returning function is a single statement that performs a specific task called when you want the function to stop a function that receives a value when called a function that will return a value back to the part of the program that called estion 18 What are the values that the variable num contains through the iterations of the following for loo for num in range (2, 9, 2): 2, 4, 6, 8 1, 3, 5, 7, 9 2, 3, 4, 5, 6, 7, 8, 9 2, 5, B
Answers
The loop will terminate when keep_on_going refers to a value equal to 999.
When will the while loop terminate in the given code?The first question asks when the loop will terminate, and the answer is when keep_on_going refers to a value equal to 999. The loop condition is checking for inequality, so it will keep looping until keep_on_going is equal to 999.
The second question presents a program that accepts test scores for three students and outputs their averages. The program uses nested loops, where the outer loop iterates through each student, and the inner loop iterates through their test scores.
The input() function is used to get the test scores from the user, and the int() function is used to convert the input string to an integer. The total score is accumulated for each student, and the average is calculated by dividing the total by the number of tests.
The third question defines a value-returning function as a function that will return a value back to the part of the program that called it. A value-returning function can perform a specific task and return a result that can be used by other parts of the program.
The fourth question asks for the values that the variable num contains through the iterations of a for loop that starts at 2 and increments by 2 up to (but not including) 9.
The answer is 2, 4, 6, and 8, as the range() function generates a sequence of numbers from the start value (2) up to (but not including) the stop value (9), incrementing by the step value (2) on each iteration of the loop.
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A weld symbol below the reference line signifies a weld on the "ARROW" side of the joint.
Answers
We have a credit charge that is trying to process but we do not remember signing up and email login is not working? Is there a way to check?
Answers
Answer:
Yes
Explanation:
In such a case, one way to check the credit charge is to contact your bank, doing so would allow the bank to check your account properly to determine where the transaction was originated from.
Another way you could check is to contact the online merchant where such a transaction was initiated.
Each summer, the swim clubs host a camp for young swimmers. To work as a counselor at one of the summer camps, an employee must be at least 21 years old. Brittany wants to determine how many employees are eligible to be camp counselors. In cell J3, enter a formula using the IF function as follows to determine if Tiffany Adams can work as a camp counselor: a. The function should use a reference to the Age column to determine if the employee's age is greater than or equal to 21, and should return the text Yes if true and No if false. b. Fill the formula into the range 34:332, if necessary.
Answers
=IF(F3>=21,"Yes","No") This formula uses the IF function to compare the value in the Age column (F3) to the minimum age requirement (21). If the value in F3 is greater than or equal to 21, the function will return "Yes", otherwise it will return "No".
What is IF?IF stands for "If Then" or "If-Else" and it is an important part of many programming languages. It is a type of conditional statement that allows you to set conditions and execute different sets of instructions depending on the outcome of the condition. For example, if an input is equal to a certain value, then a specific set of instructions will be executed. If the input is not equal to the value then a different set of instructions will be executed. IF statements are used to help create logic, control flow, and decision-making within a program.
To fill the formula into the range J3:J332, you would use the "Fill Handle" by clicking on the bottom right corner of the cell with the formula, and dragging it down the column.
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Which of the following is NOT a risky food:
a
Raw Meat
b
Uncleaned fruits & vegetables
c
Bread
d
All of the above
e
Soft Cheeses
Answers
i think it's c. bread.
Answer:I think raw meat because if you eat raw meat you get sick and get stomach aches so always when you cook meat it kill the bacteria
Explanation:what I'm trying to says is stay safe
how skateboards works?
Answers
Answer
The skateboarder applies pressure to the trucks and gives/releases pressure on the levers. Second, the wheels and the axles are also examples of simple machines. They help the skater ride, spin, grind, and do a bunch of other radical movements on a skateboard.:
Explanation:
Determine the period of oscillations in trial i. We recommend starting at the equilibrium position. Even though the video is shot at 30 frames per second, it may be challenging to find the frame where the "x" is exactly lined up with the equilibrium. Do your best. Did we mention that you need to find the period for trial i?
Answers
To determine the period of oscillations in trial i, we need to first identify the equilibrium position, which is the point at which the object is at rest. This is usually a position where the object is in balance and does not move in either direction.
Once the equilibrium position has been identified, we need to measure the time it takes for the object to complete one full cycle of oscillation, from one peak to the next. This time period is referred to as the period of oscillation.
Since the video is shot at 30 frames per second, it may be challenging to find the exact frame where the "x" is exactly lined up with the equilibrium. However, we can make an estimate by observing the motion of the object in the video and using the 30 frames per second as a reference.
It is important to note that the period of oscillation is an important parameter for understanding the behavior of an oscillating system, as it determines the frequency of oscillation. The frequency of oscillation is defined as the number of cycles completed in a given unit of time, typically measured in Hertz (Hz).
In conclusion, to determine the period of oscillations in trial i, we need to first identify the equilibrium position and then measure the time it takes for the object to complete one full cycle of oscillation. Despite the challenge of finding the exact frame where the "x" is exactly lined up with the equilibrium, we can use the 30 frames per second as a reference to make an estimate.
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The dataset contains information on 42,183 actual automobile accidents in 2001 in the United States that involved one of three levels of injury (MAX_SEV_IR): No Injury (MAX_SEV_IR=0), Injury (MAX_SEV_IR=1) or Fatality (MAX_SEV_IR=2). For each accident, additional information is recorded, such as day of week, weather conditions, and road type. A firm might be interested in developing a system for quickly classifying the severity of an accident based on initial reports and associated data in the system (some of which rely on GPS-assisted reporting).
The goal is to predict whether an accident just reported will involve an injury or will not. For this purpose, there are two classes: No Injury and Injury which includes Fatality.
Using the given 12 records in the following table...
1. Train a Decision Tree based on Information Gain.
2. Predict the class label of a case with Weather_Related = 1, traffic_Condition_Related = 1, and Speed_Limit > 50
ID Speed_Limit Traffic_Condition_Related Weather_Related MAX_SEV_IR
1 < 40 0 1 1
2 > 50 0 2 0
3 < 40 1 2 0
4 40 ~ 50 1 1 0
5 < 40 0 1 0
6 > 50 0 2 1
7 > 50 0 2 0
8 < 40 0 1 1
9 < 40 0 2 0
10 < 40 0 2 0
11 40 ~ 50 0 2 0
12 < 40 2 1 0
Answers
The dataset contains information on 42,183 actual automobile accidents in 2001 in the United States, with each accident involving one of three levels of injury (MAX_SEV_IR): No Injury (MAX_SEV_IR=0), Injury (MAX_SEV_IR=1), or Fatality (MAX_SEV_IR=2).
Additional information is recorded for each accident, such as day of the week, weather conditions, and road type. A firm aims to develop a system for quickly classifying accident severity based on initial reports and associated data.
To achieve this goal, a Decision Tree can be trained based on Information Gain using the given 12 records in the table. Once the Decision Tree is trained, it can be used to predict the class label of a case with Weather_Related = 1, Traffic_Condition_Related = 1, and Speed_Limit > 50.
However, as a text-based AI, I am unable to directly compute and generate the Decision Tree model. You can use a tool like scikit-learn in Python to train the Decision Tree model and make predictions based on the provided dataset.
After training the model, input the given case with Weather_Related = 1, Traffic_Condition_Related = 1, and Speed_Limit > 50 into the trained Decision Tree model to predict the class label for the severity of the accident (No Injury or Injury, including Fatality).
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what procedure is recommended when climbing or descending vfr on an airway?
Answers
When climbing or descending under Visual Flight Rules (VFR) on an airway, it is recommended to follow the procedure of maintaining the assigned altitude until reaching the entry or exit point of the airway.
At that point, the pilot should level off at the assigned altitude before commencing the climb or descent. When flying under VFR on an airway, pilots are expected to adhere to certain procedures to ensure safe and organized flight operations. During a climb or descent, the recommended procedure is to maintain the assigned altitude until reaching the entry or exit point of the airway. This means that the pilot should continue flying at the current altitude until reaching the designated point where the airway is entered or exited. Upon reaching the entry or exit point, the pilot should then level off at the assigned altitude before initiating the climb or descent. This helps in maintaining separation from other aircraft and ensuring a smooth transition onto or off the airway. By following this procedure, pilots can ensure compliance with air traffic control instructions, promote safety, and minimize the risk of conflicts with other aircraft operating in the vicinity.
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Liquid water flows isothermally at 20°C through a one-inlet, one-exit duct operating at steady state. The duct’s inlet and exit diameters are 0.02 m and 0.1 m, respectively. At the inlet, the velocity is 10 m/s and pressure is 1 bar. At the exit, determine the mass flow rate, in kg/s, and velocity, in m/s.
Answers
The continuity equation allows finding the results for the speed and flow of the outlet pipe are:
Q = 3.14 kg / s v₂ = 0.4 m / s
Fluid mechanics studies the movement and fluid dynamics, it is described by two fundamental relationships:
The Bernoulli equation that an expression of the energy conservation\(P_1 + \frac{1}{2} \rho v_1^2 + \rho g y_1 = P_2 + \frac{1}{2} \rho v_2^2 + \rho g y_2\)
Where P is the pressure, v the velocity, y the height, the subscripts are two selected points of interest in the pipe.
The continuity equation which is an expression that our principle of mass conservation for fluids
\(A_1v_1 = A_2 v_2\)
Where A₁ and A₂ is the area of the inlet and outlet pipes and v₁ and v₂ are the velocities of the fluid at the inlet and outlet
They indicate the inlet and outlet diameters of the pipe are d₁ = 0.02 m and d₂ = 0.1 m, the inlet velocity v₁ = 10 m / s, with the continuity equation let's find the outlet velocity
\(v_2 = ( \frac{A_1}{A_2} )^2 \ v_1\)
the cross section of the tavern is
A = \(\pi r^2 = \pi \ d^2/4\)
Where r is the radius and d is the diameter
Let's substitutes
\(v_2 = (\frac{d_1}{d_2} )^2 \ v_1\)
\(v_2 = (\frac{0.02}{0.1} )^2 \ 10\)
v₂ = 0.4 m / s
The flow (Q) is defined as the amount of liquid that passes through the section of the pipe per unit of time, we can see that this is the same conservation of mass, therefore
Q = A v
Q = \(\pi \frac{d_2^2}{4} \ v_2\)π d2 ^ 2 v2
Q = \(\pi \ \frac{0.1^2}{4} \ 0.4\)
Q = 3.14 10⁻³ m ^ 3 / s
As the transported liquid is water
1 liter water = 1 kg
Consequently
1 m³ = 1000 liter = 1000 kg of water
Let's reduce the flow
Q = 3.14 10⁻³ m³/s ( \(\frac{10^3 kg}{1 m^3}\) )
Q = 3.14 kg / s
In conclusion using the continuity equation we can find the results for the speed and flow of the outlet pipe are:
v₂ = 0.4 m / s Q = 3.14 kg / s
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over time the purchasing power of money
Answers
Purchasing can become worse over time as a result of inflation.
The quantity of items or services that one measure of a currency can be utilized to purchase determines the currency's value.
This is due to the possibility that you will purchase less goods or services as a result of price increases. The buying power of a money is another term for it.
Buying or purchasing power, when used in relation to investments, is the credit limit that a client has in relation to the marginable assets that are currently in their brokerage account.
The quantity of products or services that one dollar can currently buy is measured by its buying power.
Inflation gradually lowers a country's currency purchasing power over time.
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Fixed price contract is one of the contractual arrangement. discuss the condition that makes the price to remain fixed
Answers
A fixed-price contract is an agreement in which the buyer and seller agree to a specific price for goods or services.
The price agreed to at the time of the contract's formation is intended to be final and not subject to any changes.
However,
there are some conditions that can make the price remain fixed.
The following are some of the conditions that make the price of a fixed-price contract to remain fixed:
Defined scope of work
A defined scope of work ensures that the contract’s scope is limited and well-defined.
This can make it easy to determine the price of the contract.
Clear project requirements
Having clear project requirements helps ensure that there are no changes in the contract.
fixed-price contract is more likely to remain fixed if the project requirements are well-defined.
No changes to scope of work
Any change in scope of work can make the price of a fixed-price contract to change.
As a result, any changes to the scope of work must be documented and agreed upon by both parties.
Price adjustments
There are price adjustment clauses in fixed-price contracts that allow the price to be adjusted if there is a change in economic or market conditions.
Price ceilings
The contract may also have a price ceiling that restricts the amount of money the seller can charge.
This ensures that the price remains fixed and that the buyer is not overcharged.
Consequently,
a fixed-price contract can remain fixed if the scope of work is well-defined,
project requirements are clear,
no changes are made to the scope of work,
and price adjustments and price ceilings are in place.
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a 4-m-long beam is subjected to a variety of loadings. (a) replace each loading with an equivalent force-couple system at end a of the beam. (b) which of the loadings are equivalent?
Answers
After the replacement of loading with equivalent force-couple system, Therefore, loadings (c) and (h) are equivalent.
in System Equivalents: two force-couple systems that have the same net moment and net force on a body.
RA= -(300+200)
= -500N
MA=400N.M +200*3
MA=1000N.M
RA=200+300
=500N
MA= -400+300*3
=500N.M
RA= -(200+300)
= -500N
RA=500N
MA=400-500*3
= -11OON.M
(B) No '2' beams are equivalent
Your question is incomplete, Find the attachment 'missing part'
The explanation is in attachment on Explanation 1 &2 attachment
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A heat engine is a device able to transform work into heat.
a. True
b. False
Answers
Answer:
Option B: False
Explanation:
A heat engine is a device which operates in a manner that heat is converted into mechanical work.
A simple example of a heat engine is a drinking bird. The oscillatory motion of the drinking bird is as a result of the thermal expansion and contraction of a chemical compound in its beak, which creates an imbalance in its position of equilibrium. This causes it to oscillate.
Heat engines usually work by extracting heat once there is a temperature gradient available in the system and using it to perform work. Another good example is the internal combustion engine. It extracts heat from the explosion of the burning fuels and uses it to power the car.
4.11 LAB: Mileage tracker for a runner Given the MileageTrackerNode class, complete main() in the MileageTrackerLinkedList class to insert nodes into a linked list (using the insertAfter() method). The first user-input value is the number of nodes in the linked list. Use the printNodeData() method to print the entire linked list. DO NOT print the dummy head node. Ex. If the input is:
Answers
Using the knowledge of computational language in C++ it is possible to write a code that user-input value is the number of nodes in the linked list
Writting the code:#include "MileageTrackerNode.h"
#include <string>
#include <iostream>
using namespace std;
int main(int argc, char *argv[]) {
// References for MileageTrackerNode objects
MileageTrackerNode *headNode;
MileageTrackerNode *currNode;
MileageTrackerNode *lastNode;
double miles;
string date;
// Front of nodes list
headNode = new MileageTrackerNode();
lastNode = headNode;
// Read in the number of nodes
int no_nodes;
cin >> no_nodes;
// For the read in number of nodes, read in data and insert into the linked list
MileageTrackerNode *tail = headNode;
for (int i = 0; i < no_nodes; ++i) {
double milesInit;
cin >> milesInit;
cin >> date;
MileageTrackerNode *newNode = new MileageTrackerNode(milesInit, date, nullptr);
tail->InsertAfter(newNode);
tail = newNode;
}
// Call the PrintNodeData() method to print the entire linked list
MileageTrackerNode *cur = headNode->GetNext();
while (cur != nullptr) {
cur->PrintNodeData();
cur = cur->GetNext();
}
// MileageTrackerNode Destructor deletes all following nodes
delete headNode;
}
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a pipeline constructed of carbon steel failed after 3 years of operation. on examination it was found that the wall thickness had been reduced by corrosion to about half the original value. the pipeline was constructed of nominal 100 mm (4 in) schedule 40, pipe, inside diameter 102.3 mm (4.026 in), and outside diameter 114.3 mm (4.5 in). estimate the rate of corrosion in ipy and mm per year.
Answers
In this scenario, a pipeline made of carbon steel failed after three years of operation due to corrosion. The wall thickness of the pipeline had reduced to about half of its original value. The pipeline was constructed of nominal 100 mm (4 in) schedule 40 pipe, with an inside diameter of 102.3 mm (4.026 in) and an outside diameter of 114.3 mm (4.5 in).
To estimate the rate of corrosion in IPY (inches per year) and mm per year, we need to use the following formula:
Rate of Corrosion = (Original Thickness - Remaining Thickness) / (Operation Time x Corrosion Allowance)
The original thickness of the pipeline can be calculated as:
Original Thickness = (Outside Diameter - 2 x Corrosion Allowance)
We know that the outside diameter of the pipeline is 114.3 mm (4.5 in) and the schedule 40 pipe has a corrosion allowance of 3.05 mm (0.12 in). Therefore, the original thickness can be calculated as:
Original Thickness = (114.3 mm - 2 x 3.05 mm) = 108.2 mm (4.26 in)
Now we can use the formula to estimate the rate of corrosion in IPY and mm per year:
Rate of Corrosion in IPY = (Original Thickness - Remaining Thickness) / (Operation Time x Corrosion Allowance)
Rate of Corrosion in IPY = (108.2 mm - 0.5 x 108.2 mm) / (3 years x 0.12 in)
Rate of Corrosion in IPY = 49.6 IPY
Rate of Corrosion in mm per year = (Original Thickness - Remaining Thickness) / (Operation Time x Corrosion Allowance)
Rate of Corrosion in mm per year = (108.2 mm - 0.5 x 108.2 mm) / (3 years x 3.05 mm)
Rate of Corrosion in mm per year = 4.8 mm/year
The rate of corrosion in IPY is estimated to be 49.6 IPY, and in mm per year, it is estimated to be 4.8 mm/year. These calculations help us to understand the rate at which the pipeline deteriorated due to corrosion, which can be used to prevent future failures and ensure the safety and longevity of similar pipelines.
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A cubic yard of concrete contains how many cubic feet
Answers
Most concrete purchases will be made in cubic yards, which equates to 27 cubic feet.At a depth of 3 inches, a cubic yard of material can be spread over a 10×10 area (100 square feet).
1 cubic yard is 46,656 cubic inches (36 inch x 36 inch x 36 inch)
36 inches or three feet make up one yard.
3 feet are equal to 1 yard.
As an illustration, consider a volume of 9-inch-thick, 12-foot-long, 12-foot-wide concrete:
The conversion from inches to feet is 9 inches by 12 inches, or 0.75 feet.
The amount of cubic feet can be calculated by multiplying the length, width, and thickness together: 0.75' x 12' x 12 = 108 cubic feet
We can now divide the concrete's volume, 108 cubic feet, by 27 because we know that 1 cubic yard equals 27 cubic feet.
Concrete equals 108/27 or 4 cubic yards.
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How many cubic feet in a cubic yard of concrete?
Anyone got a pc that can run 240 fps? Around like 1,300 dollars that can run 240 fps on fortnite whoever answers and gives me a good pc I will give brainliest
Answers
Answer:
What do u need it for just gaming or for streaming and other things
A horizontal force P is applied to a 130 kN box resting on a 33 incline. The line of action of P passes through the center of gravity of the box. The box is 5m wide x 5m tall, and the coefficient of static friction between the box and the surface is u=0.15. Determine the smallest magnitude of the force P that will cause the box to slip or tip first. Specify what will happen first, slipping or tipping.
Answers
Answer:
SECTION LEARNING OBJECTIVES
By the end of this section, you will be able to do the following:
Distinguish between static friction and kinetic friction
Solve problems involving inclined planes
Section Key Terms
kinetic friction static friction
Static Friction and Kinetic Friction
Recall from the previous chapter that friction is a force that opposes motion, and is around us all the time. Friction allows us to move, which you have discovered if you have ever tried to walk on ice.
There are different types of friction—kinetic and static. Kinetic friction acts on an object in motion, while static friction acts on an object or system at rest. The maximum static friction is usually greater than the kinetic friction between the objects.
Imagine, for example, trying to slide a heavy crate across a concrete floor. You may push harder and harder on the crate and not move it at all. This means that the static friction responds to what you do—it increases to be equal to and in the opposite direction of your push. But if you finally push hard enough, the crate seems to slip suddenly and starts to move. Once in motion, it is easier to keep it in motion than it was to get it started because the kinetic friction force is less than the static friction force. If you were to add mass to the crate, (for example, by placing a box on top of it) you would need to push even harder to get it started and also to keep it moving. If, on the other hand, you oiled the concrete you would find it easier to get the crate started and keep it going.
Figure 5.33 shows how friction occurs at the interface between two objects. Magnifying these surfaces shows that they are rough on the microscopic level. So when you push to get an object moving (in this case, a crate), you must raise the object until it can skip along with just the tips of the surface hitting, break off the points, or do both. The harder the surfaces are pushed together (such as if another box is placed on the crate), the more force is needed to move them.
what faciltiates encoding and retirival when it comes to schema
Answers
When it comes to schema, encoding and retrieval are facilitated by the fact that schema serves as a mental framework or structure for organizing and interpreting information.
Detailed answer:
1: Encoding refers to the process of taking in new information and transforming it into a format that can be stored in memory, and schema can help facilitate this process by providing a framework for understanding and categorizing new information.
2: Retrieval, on the other hand, refers to the process of accessing stored information from memory, and schema can also facilitate this process by providing a framework for accessing relevant information and filtering out irrelevant information.
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The injection molding department of a company that operates 24x7 uses an average of 34 gallons of special lubricant per day. The usage of lubricant is normally distributed with a standard deviation of 4.4 gallons per day and it takes 6.5 weeks for an order of lubricant to be delivered. If the largest service level is 73%, what is the reorder point?
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The injection molding department of a company that operates 24x7 uses an average of 34 gallons of special lubricant per day. The usage of lubricant is normally distributed with a standard deviation of 4.4 gallons per day and it takes 6.5 weeks for an order of lubricant to be delivered. If the largest service level is 73% The reorder point for the injection molding department is approximately 1549.508 gallons.
To calculate the reorder point, we need to consider the lead time demand, which is the demand during the time it takes for a new order to be delivered.
Given that the injection molding department operates 24x7 and uses an average of 34 gallons of special lubricant per day, we can calculate the daily demand as 34 gallons.
Since the demand follows a normal distribution with a standard deviation of 4.4 gallons per day, we can use the Z-score formula to calculate the safety stock. The Z-score represents the number of standard deviations from the mean.
To determine the Z-score corresponding to a service level of 73%, we can use a Z-table or a statistical calculator. The Z-score for a 73% service level is approximately 0.57.
Next, we need to calculate the lead time demand. The lead time is given as 6.5 weeks, and since there are 7 days in a week, the lead time is equal to 6.5 x 7 = 45.5 days.
To calculate the lead time demand, we multiply the average daily demand by the lead time in days. Therefore, the lead time demand is 34 gallons/day x 45.5 days = 1547 gallons.
To calculate the reorder point, we add the lead time demand to the safety stock. The safety stock is given by the formula: Safety Stock = Z-score x standard deviation.
Using the given standard deviation of 4.4 gallons per day and the calculated Z-score of 0.57, the safety stock is 0.57 x 4.4 gallons/day = 2.508 gallons.
Finally, we can calculate the reorder point by adding the lead time demand to the safety stock: Reorder Point = Lead time demand + Safety stock.
Reorder Point = 1547 gallons + 2.508 gallons = 1549.508 gallons.
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How does energy transition from one form to another as water moves from behind a dam to downstream of a dam?.
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Answer:
potential energy changes to kinetic energy
Explanation:
Discuss the exciton roles in silicon solar cell
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Excitons play a crucial role in silicon solar cells and are involved in several processes that contribute to the generation of electricity. Here are some key roles of excitons in silicon solar cells:
1. Absorption of Photons: When photons from sunlight strike the silicon material of a solar cell, they can be absorbed by silicon atoms, promoting an electron from the valence band to the conduction band. This process creates an exciton—a bound electron-hole pair.
2. Exciton Diffusion: After absorption, excitons can diffuse through the silicon material, moving towards the region of the solar cell where charge separation occurs. This diffusion process allows excitons to reach the vicinity of the p-n junction, where the separation of charges takes place.
3. Exciton Dissociation: At the p-n junction of a silicon solar cell, excitons can undergo dissociation. The electric field created by the junction separates the electron and hole of the exciton, allowing them to move freely in opposite directions as charge carriers.
4. Electron and Hole Transport: Once the exciton is dissociated, the free electron and hole can move independently within the solar cell. They are transported through the silicon material to the respective electrodes, creating an electric current that can be harnessed for external use.
5. Recombination: Excitons can also undergo recombination, where the electron and hole recombine, releasing energy in the form of light or heat. Recombination is undesirable in solar cells as it reduces the overall efficiency of the device.
To enhance the efficiency of silicon solar cells, various strategies are employed to minimize exciton recombination and improve exciton dissociation and charge carrier transport. These include the use of anti-reflection coatings, surface passivation techniques, and optimization of the device structure.
Overall, excitons play a vital role in the absorption and conversion of sunlight into electrical energy in silicon solar cells. Understanding and controlling exciton dynamics are essential for improving the performance of solar cells and advancing the field of photovoltaics.
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onsider a venturi with a throat-to-inlet area ratio of 0.8, mounted on the side of an airplane fuselage. the airplane is in flight at standard sea level. if the static pressure at the throat is 2100 lb/ft2, calculate the velocity of the airplane.
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bar element for truss structures and beam element for frame structures are both line element. what is the main difference between these two types of elements
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Both bar elements for truss structures and beam elements for frame structures are line elements that are commonly used in structural engineering. While both types of elements serve the same general purpose of providing support and stability to a structure, there are some key differences between them.
One of the main differences between bar elements and beam elements is the way that they distribute loads. Bar elements, which are used in truss structures, distribute loads axially along their length. This means that they are designed to handle forces that act in a straight line, such as tension or compression. In contrast, beam elements, which are used in frame structures, distribute loads both axially and transversely. This means that they are designed to handle forces that act in a variety of directions, such as bending or shear.
In summary, the main differences between bar elements and beam elements are the way that they distribute loads, the way that they are supported, and their cross-sectional shape. While both types of elements are important for providing structural support, they are designed to handle different types of forces and are used in different types of structures.
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Imagine that, for only ONE of the force sensors, there was an angle ϴ between the direction the string was pulling and the direction the force sensor can measure. Would that force sensor read high or low?
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The force sensor would read low. When there is an angle ϴ between the direction the string pulls and the sensor's measuring direction.
the measured force is the component of the force vector in the sensor's direction. As ϴ increases, the component of the force vector in the sensor's direction decreases, resulting in a lower reading on the force sensor. The force sensor measures the force along its measuring direction, so any deviation from that direction reduces the measured force value. The force sensor would read low. When there is an angle ϴ between the direction the string pulls and the sensor's measuring direction, the measured force would be lower due to the reduction in the component of the force vector along the sensor's measuring direction.
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Eleanore Rigby picks up the rice in the church after the wedding. Why she might she do this?
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Explanation:
It gives her a sense of purpose.
explain why it is not advisable to wear a ring at work shop
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Answer:
Metal conducts heat so it could severely burn your finger.
Rings can create multiple hazards while working with chemicals.
Rings/Jewlery can be a "hiding place" for bacteria.
Amongst many other reasons as to why it's not advisable to wear a ring(s) at a workshop/workplace.