What is the driving force behind evolving technology?
is the main factor that drives the evolution of technology.
Answers
Creativity and Innovation.
Communication, Innovativeness, knowledge, quality of the product, and motivation...
Related Questions
You filled a balloon that has a volume of 45 cm3 with helium gas. What is the volume of the helium gas?
Answers
Answer:
The volume of the helium gas is 45 cm³.
Explanation:
The volume of the helium gas can be determined from kinetic theory of gases, which states that gas molecules do not have a fixed volume, rather they assume the volume of their container.
Therefore, if the volume of the balloon is 45 cm³, which is also the container of the helium gas, then the volume of the helium gas is 45 cm³.
In poor weather you should___ your following distance
Answers
What (external) performance measures would you recommend the
space x falcon 9 AI System?
Answers
For external performance measures recommended for Space X Falcon 9 AI System, the following should be implemented:For all industries, it's critical to have standard measures of success and performance.
In the aerospace and defense industries, this is particularly critical, given the high stakes and the degree of public scrutiny. To assess the quality of the Falcon 9 rocket and AI systems, Space X will require the following performance indicators:
Safety: The Falcon 9 rocket's main aim is to deliver payloads into space safely. An AI system's main goal is to avoid errors that could lead to mishaps. Therefore, it's critical to establish safety standards and evaluate them regularly with measurable performance indicators that reflect both the system's and the rocket's effectiveness.
To know more about measures visit:
https://brainly.com/question/2384956
#SPJ11
given that t refers to a tuple, write a statement that assigns the value of its first element to k.
Answers
The statement that assigns the value of the first element of a tuple to variable k can be written as:
k = t[0]
Here, t refers to the tuple and the [0] index represents the first element of the tuple. The value of this first element is then assigned to the variable k.
In Python, tuples are ordered and immutable sequences of elements, which can be of different types. Tuples are accessed using index numbers starting from 0 for the first element, similar to accessing elements in lists. However, unlike lists, tuples cannot be modified once they are created.
In the statement k = t[0], we are assigning the value of the first element of the tuple t to the variable k. This is a common operation when working with tuples, especially when we want to extract specific values from a tuple and use them in our code. The statement works by using the indexing operator [0] to access the first element of the tuple, and then assigning its value to the variable k.
To learn more about tuples, click here: brainly.com/question/30037225
#SPJ11
Complete the following code to produce the expected output shown below: sinclude 5 stdion int maind) int is forf=2:i< ton2]=1:∣α= ก] % ww 00 pohtrit else arint? x orinal" n ': 1 returniors 1 Expocted Output:
Answers
To complete the given code and produce the expected output, you need to make some modifications and additions to the provided code snippet.
To begin, the code snippet is missing the necessary header files for input and output operations. You should include the <iostream> and <stdio.h> headers at the beginning of the code.
Next, you need to define the main function by replacing int maind) with int main().
Within the main function, initialize the integer variable f with the value 2. Then, use a for loop to iterate from i = 0 to i < f. Inside the loop, assign the value 1 to the f-th element of the array ton2.
After the loop, add an if-else statement to check the condition ∣α = ก] % ww 00 pohtrit. In the if block, print the character 'x'. In the else block, print the string "Original".
Finally, add a return statement with the value 1 to the end of the main function to indicate a successful execution.
By completing these modifications, the code will produce the expected output: "x Original".
Learn more about code snippet
brainly.com/question/30471072
#SPJ11
A traffic control engineer reports that 75% of the vehicles passing through a check poin from within the state. [15 points]
a. What is the probability that exactly three of the next 9 vehicles are from out of state? 5 points
b. It is estimate that 140 vehicles will go through this check point in the next hour What is the expected number of vehicles from out of state in the next hour? 5
c. What is the probability of the number of vehicles varying between 2 standard deviations from the mean number of those passing through the check point
Answers
Answer:
a. To solve this problem, we can use the binomial probability formula:
P(X=k) = (n choose k) * p^k * (1-p)^(n-k)
where:
- X is the number of out-of-state vehicles in a sample of n vehicles
- k is the number of out-of-state vehicles we're interested in (in this case, k=3)
- p is the probability that a given vehicle is from out of state (in this case, p=0.25)
- n is the sample size (in this case, n=9)
Plugging in the values, we get:
P(X=3) = (9 choose 3) * 0.25^3 * 0.75^6
= 84 * 0.0039 * 0.1785
= 0.5907%
Therefore, the probability that exactly three of the next 9 vehicles are from out of state is 0.5907%.
b. To find the expected number of out-of-state vehicles in the next hour, we can use the formula:
E(X) = n * p
where:
- X is the number of out-of-state vehicles in a sample of n vehicles
- p is the probability that a given vehicle is from out of state (in this case, p=0.25)
- n is the sample size (in this case, n=140)
Plugging in the values, we get:
E(X) = 140 * 0.25
= 35
Therefore, the expected number of vehicles from out of state in the next hour is 35.
c. To find the probability of the number of vehicles varying between 2 standard deviations from the mean number of those passing through the check point, we need to find the mean and standard deviation of the number of out-of-state vehicles in a sample of 140 vehicles.
The mean is simply the expected value we found in part b:
mean = 35
The variance of a binomial distribution is:
Var(X) = n * p * (1-p)
where:
- X is the number of out-of-state vehicles in a sample of n vehicles
- p is the probability that a given vehicle is from out of state (in this case, p=0.25)
- n is the sample size (in this case, n=140)
Plugging in the values, we get:
Var(X) = 140 *
hope this helps :o
P(X=3) = (9 choose 3) * (0.25)^3 * (0.75)^6 = 0.250
Therefore, the probability that exactly three of the next 9 vehicles are from out of state is 0.250.
b. To find the expected number of vehicles from out of state in the next hour, we can use the formula for the mean of a binomial distribution:
E(X) = n*p = 140 * 0.25 = 35
Therefore, the expected number of vehicles from out of state in the next hour is 35.
c. To find the probability of the number of vehicles varying between 2 standard deviations from the mean number of those passing through the check point, we need to find the standard deviation of the binomial distribution:
σ = sqrt(n*p*(1-p)) = sqrt(140*0.25*0.75) = 5.369
The mean number of vehicles passing through the checkpoint is 35, so 2 standard deviations from the mean is 35 ± 2*5.369 = (24.262, 45.738).
To find the probability of the number of vehicles varying between 2 standard deviations from the mean, we can use the normal approximation to the binomial distribution:
P(24.262 < X < 45.738) = P(Z < (45.738-35)/5.369) - P(Z < (24.262-35)/5.369) = P(Z < 1.867) - P(Z < -2.042) = 0.968 - 0.020 = 0.948
Therefore, the probability of the number of vehicles varying between 2 standard deviations from the mean is 0.948.
______ are an idication that your vehicle may be developing a cooling system problem.
Answers
Answer:
The temperature gauge showing that the vehicle has been running warmer or has recently began to have issues from overheating is an idication that your vehicle may be developing a cooling system problem.
Explanation:
The most common type of pressure gauge is the 1. Piston 2. Linkage 3. Bourdon Tube 4. 5. Temperature
Answers
Answer:
Bourdon Tube gauge
Explanation:
The most popular type of pressure gauge in several countries is the Bourdon pressure tube gauge, that is used to determine medium and high loads. Bourdon tube will measure pressures ranging between 600 mbar - 4,000 bar. While the inner pressure is greater than the exterior pressure, the tube pushes forward, and vise versa.
What type of engineer makes sure equipment is safe and operational
Answers
Answer:
mechanical engineer is the best answer
Which of the following is not a characteristic of an external combustion engine?
A. External pistons are used.
B. Fuel is sent directly to the engine.
C. Boiler burns fuel to produce steam.
D. Steam is sent to the engine to produce power.
Answers
The power by the dominant group over minority groups takes place through institutions, including mass media and popular culture, that communicate the ruling values and beliefs that are sometimes taken up by members of the minority group is called…
a.hegemony
b.discrimination
c.racism
d.oppression
Answers
The power exerted by the dominant group over minority groups through institutions, such as mass media and popular culture, in order to communicate and reinforce ruling values and beliefs that may be adopted by members of the minority group is referred to as hegemony.
The term "hegemony" best describes the concept described in the question. Hegemony refers to the social, cultural, and ideological influence wielded by the dominant group over subordinate groups within a society. It involves the imposition of dominant norms, values, and beliefs that shape the worldview and behavior of both the dominant and subordinate groups.
In this context, institutions like mass media and popular culture play a significant role in disseminating and reinforcing the ideologies and narratives of the dominant group. By controlling the representation, portrayal, and dissemination of information, the dominant group can shape public opinion and maintain their position of power and control.
However, it is important to note that while hegemony influences the beliefs and behaviors of some members of the minority group, it does not encompass all forms of discrimination, racism, or oppression. These terms represent specific manifestations of power imbalances and discriminatory practices, which can be reinforced by hegemonic systems but are not limited to them.
Learn more about hegemony here :
https://brainly.com/question/31452683
#SPJ11
A) Describe factor substitution with respect to building heights. Be sure to explain at least two reasons why office buildings (with extra benefits from proximity) tend to "build up" rather than build out. B) A key assumption for being able to model building heights is that building a taller building increases the cost per square foot (the second floor is more expensive to construct than the first floor, ect.) What sort of strange result would we predict if this was not the case? ("Building up" got cheaper per floor with each floor constructed)?
Answers
A) Factor substitution: replacing factors of production for desired outcomes, like building taller or expanding horizontally in limited urban land.
B) Cheaper per floor: no height limit incentive, leading to excessively tall structures and inefficient resource allocation.
A) Factor substitution refers to the decision-making process where factors of production, such as land and capital, are substituted for one another to achieve a desired outcome. In the context of building heights, it relates to the trade-off between constructing taller buildings (building up) versus expanding horizontally (building out).
One reason office buildings tend to "build up" is the limited availability of land in urban areas. Cities often have limited space for new construction, leading to higher land costs. By constructing taller buildings, developers can maximize the utilization of limited land resources and accommodate more office space within a smaller footprint.
Another reason is the benefit of proximity. In urban environments, being close to other businesses, amenities, transportation, and potential clients is advantageous. Building up allows office buildings to take advantage of centralized locations and create a concentration of economic activity. This proximity can lead to increased collaboration, networking opportunities, and accessibility, which are beneficial for businesses.
B) If the assumption that building a taller building increases the cost per square foot were not valid and instead "building up" became cheaper per floor with each floor constructed, a strange result would be observed. In such a scenario, there would be no economic incentive to limit the height of buildings. Developers would have a strong incentive to keep building higher and higher, as each additional floor would cost less per square foot compared to the previous ones.
This could lead to extremely tall buildings with a large number of floors, possibly surpassing the practical and engineering limits. The skyline of cities would be dominated by excessively tall structures, even if there was no corresponding increase in demand or economic justification. The lack of increasing costs per floor would disrupt the typical cost-benefit trade-off associated with building heights and result in an inefficient allocation of resources.
Learn more about urban development here: brainly.com/question/20063741
#SPJ11
The UHRS platform is optimized for Edge/Internet Explorer only. You can still use your favorite browser, but keep in mind that you may experience technical issues when working on UHRS with a different browser than Edge or Internet Explorer.
UHRS is optimized for...
Answers
It is to be noted that all UHRS platforms are optimized for the popular kinds of internet browser applications.
What is a UHRS?The Universal Human Relevance System (UHRS) is a crowdsourcing platform that allows for data labeling for a variety of AI application situations.
Vendor partners link people referred to as "judges" to offer data labeling at scale for us. All UHRS judges are bound by an NDA, ensuring that data is kept protected.
A browser is a software tool that allows you to see and interact with all of the knowledgeon the World Wide Web. Web sites, movies, and photos are all examples of this.
Learn more about internet browser applications.:
https://brainly.com/question/16829947
#SPJ1
Gear friction reduces power and engineers never use more gears than are need it.
A) True
B) False
Answers
Answer:
i personally think it is false
Explanation:
i think this because gear friction reduces next to no power
Malia is working with aluminum wire. while working with this type of wire, she must remember to a. always use pressure-type terminals. b. avoid copper connectors. c. avoid solder-type lugs. d. apply antioxidation paste
Answers
Answer:
B
Explanation:
Aluminium doesn't rust unless exposed to copper for a duration of time.
dentify the recommended practices when putting a tip on a micropipette. Select one or more: Gently push the micropipette into the tip and tap lightly to load the tip. Hold the micropipette at a 45 degree angle to the tip rack. Use the tip size designed for the micropipette size in use. Remove the tip from the rack and place it on micropipette by hand.
Answers
Answer:
Gently push the micropipette into the tip box and tag tightly to load the tip.
Explanation:
The recommended practice when putting a tip on a micropipette is ; Gently push the micropipette into the tip box and tag tightly to load the tip.
Given that it is not advisable to remove tip from rack so as not to contaminate it, if we want to put a tip on a micropipette we should gently push the micropipette into the tip box.
The 6 -kg smooth cylinder is supported by the spring having a stiffness of kAB = 120 N/m. Determine the velocity of the cylinder when it moves downward s = .2m from its equilibrium position, which is caused by the application of the force F = 60 N. (The 60 N force is not present in the equilibrium position.)
Answers
The velocity of the cylinder when it moves downward s = 0.2m from its equilibrium position is; 1.55 m/s
How to find the velocity of the cylinder?At the equilibrium position, since;
F_sp = kx₀
We are given kAB = 120. Thus;
F_sp = 120x₀
Resolving forces about the y-axis gives;
∑f_y = 0, we have;
120x₀ - 4(9.81) = 0
x₀ = (6 * 9.81)/120
x₀ = 0.4905 m
Thus, when the 60 N force is applied, the compression of the spring is;
x = s + 0.4905 m
Thus;
F_sp = 120(s + 0.4905 m)
Then balancing of upward and downward forces gives us;
120(s + 0.4905) − 60 − 6(9.81) = 6(−a)
120s - 60 = -6a
a = 10 - 20s
At the initial condition v=0 at s = 0, we integrate to get the velocity;
v²/2 = 10s - 20s²
v = √(20s - 40s²)
At s = 0.2 m, we have;
v = √(20(0.2) - 40(0.2)²)
v = 1.55 m/s
Read more about Velocity of Cylinder at; https://brainly.com/question/9485953
#SPJ1
Suppose we have a capacitance C discharging through a resistance R. Select the correct definition for the time constant. The time constant τ is the interval required for the voltage to fall to ln(2):兰0.693 times from its initial value The time constant τ is the interval required for the voltage to rise to exp(-1) times its initial value. 0.368 The time constant τ is the interval required for the voltage to fall to exp (-1) times its initial value 0.368 The time constant τ is the interval required for the voltage to rise to 2 times from its initial value Submit My Answers Give Up Screen Shot 2017-10-28 at 10.53.29 PM Q Search In physics, the half-life is often used to characterize exponential decay of physical quantities such as radioactive substances. The half-life is the time required for the quantity to decay to half of its initial value. The time constant for the voltage on a capacitance discharging through a resistance is τ = RC Part A Find an expression for the half-life of the voltage in terms of R and C Express your answer in terms of R and C vec Submit My Answers Give Up.
Answers
The correct definition for the time constant T in relation to capacitance C and resistance R is: The time constant T is the interval required for the voltage to fall to exp(1) 0.368 times its initial value.i.e t = -RC * ln(1/2)
To find an expression for the half-life of the voltage in terms of R and C, you can use the equation T = RC. Since the half-life is the time required for the voltage to decay to half of its initial value, you can set the voltage to V_0/2, where V_0 is the initial voltage.
Using the exponential decay formula:
V(t) = V_0 * exp(-t/RC)
Substitute V(t) = V_0/2 and solve for t (half-life):
V_0/2 = V_0 * exp(-t/RC)
Divide both sides by V_0:
1/2 = exp(-t/RC)
Now, take the natural logarithm (ln) of both sides:
ln(1/2) = -t/RC
Solve for t (half-life):
t = -RC * ln(1/2)
This is the expression for the half-life of the voltage in terms of R and C.
Learn more about voltage: https://brainly.com/question/1176850
#SPJ11
The correct definition for the time constant T in relation to capacitance C and resistance R is: The time constant T is the interval required for the voltage to fall to exp(1) 0.368 times its initial value.i.e t = -RC * ln(1/2)
To find an expression for the half-life of the voltage in terms of R and C, you can use the equation T = RC. Since the half-life is the time required for the voltage to decay to half of its initial value, you can set the voltage to V_0/2, where V_0 is the initial voltage.
Using the exponential decay formula:
V(t) = V_0 * exp(-t/RC)
Substitute V(t) = V_0/2 and solve for t (half-life):
V_0/2 = V_0 * exp(-t/RC)
Divide both sides by V_0:
1/2 = exp(-t/RC)
Now, take the natural logarithm (ln) of both sides:
ln(1/2) = -t/RC
Solve for t (half-life):
t = -RC * ln(1/2)
This is the expression for the half-life of the voltage in terms of R and C.
Learn more about voltage: https://brainly.com/question/1176850
#SPJ11
Select all the correct answers. What are two reasons why the terrestrial planets formed closer to the sun after a supernova event that initiated the formation of the solar system?
Answers
Multiple Choice
The first step in product analysis is to disassemble a product.
True
False
Answers
Answer:
the answer is false
Explanation:
i took the advice of the other person and found a Quizlet that said false :)
i hope this helps :D
Which disk interface uses parallel data transfer but has high reliability and an advanced command set? group of answer choices sata pata scsi sas
Answers
A disk interface that is designed and developed to use parallel data transfer but with high reliability and an advanced command set is: C. PATA.
What is a hard-disk drive?A hard-disk drive can be defined as an electro-mechanical, non-volatile data storage device that is made up of magnetic disks (platters) that rotates at high speed.
What is Disk Management?Disk Management can be defined as a type of utility that is designed and developed to avail end users an ability to convert two or more basic disks on a computer system to dynamic disks.
In Computer technology, PATA is a disk interface that is designed and developed to use parallel data transfer but with high reliability and an advanced command set.
Read more on Disk Management here: brainly.com/question/6990307
#SPJ1
The amusement park ride consists of a fixed support near O, the 6-m arm OA, which rotates about the pivot at O, and the compartment, which remains horizontal by means of a mechanism at A. At a certain instant, β=30ο, 2 0.75 rad/s, and 0.5 rad/s , all clockwise. Determine the horizontal and vertical forces (F and N) exerted by the bench on the 75-kg rider at P. Compare your results with the static values of these forces. (Use x-y coordinate system and vector equations
Answers
Answer:
Check the explanation
Explanation:
Kindly check the attached image below to see the step by step explanation to the question above.
QUESTIONS
DOK S STANDARD RST.1
MS-PS2-2
A car driving at a constant speed of 20 m/s(meters per second)
turns right, down a street.
1. Is the car accelerating during the turn? Why or why not?
2. Would you feel any of the movement during this event? Why
or why not?
Answers
ANSWER:
1) The car is not accelerating, because for the the car to turn while accelerating down the street, it has to deaccelerate (reduce speed) due to CENTRIPETAL FORCE that is acting on the car during the turn. This force acts to bring the car in the direction where it has turned to.
2) You will feel the movement as everyone in the car will tend to fall to the left, while the car makes a right turn. This is because of CENTRIFUGAL FORCE, which is acting to take the car to a left direction, while the car is turning to the right direction.
using the what-if function in excel to make a decision is considered a type of __________.
Answers
The use of the 'what-if' function in MS Excel makes a decision a type of forecast and scenario model.
In MS Excel, the 'what-if' function allows changing the values in cells to check to see how those changes affect the outcome of formulas on the worksheet. When the 'what-if' function of Excel is used to check different outcomes of decisions based on different values on input, it is considered a type of forecast and scenario model. The forecast and scenario model depicts a strategic method for businesses that is used to plan various potential futures. These scenarios are forecasted on the basis of visible risks and assumed uncertainties existing in a set of plausible situations. In short, it can be said that it helps to model multiple 'what-if' scenarios to be prepared for the future.
You can learn more about MS Excel at
https://brainly.com/question/19295387
#SPJ4
1) Metals are good conductors of both heat and electricity due toA) similar thermal and electrical conductive properties.B) looseness of outer electrons in metal atoms.C) relatively high densities of metals.D) high elasticity of metals.E) both transferring energy easily.
Answers
Metals are good conductors of both heat and electricity due to: Option B - looseness of outer electrons in metal atoms. Option B is the correct answer.
Metals have the ability to conduct heat and electricity effectively because of the looseness of their outer electrons. In metallic bonding, the valence electrons of metal atoms are not strongly bound to individual atoms but are free to move within the metal lattice. These delocalized electrons can easily transfer thermal energy (heat) and electrical energy (electricity) throughout the metal structure. The mobility of the electrons allows for efficient conduction of both forms of energy.
Therefore, option B is the correct answer. Options A, C, D, and E do not accurately explain the primary reason for the good conductivity of metals.
You can learn more about Metals at
https://brainly.com/question/4701542
#SPJ11
whats an impact of the development of empires in mesopotamia
Answers
The development of empires in Mesopotamia had a significant impact on the region and the world as a whole. Mesopotamia was the cradle of civilization and the place where the first empires emerged. These empires were characterized by their highly organized and centralized systems of government, sophisticated legal codes, and complex economies.
The development of empires in Mesopotamia had several important impacts, including the spread of civilization, the advancement of technology, and the growth of trade and commerce. Mesopotamia was a melting pot of cultures, and the empires that emerged there played a vital role in the spread of civilization. They established trade routes that spanned the ancient world, and their technological innovations, such as the wheel and irrigation systems, had a lasting impact on human history. The development of empires in Mesopotamia also had a profound impact on the way we think about government and society.
These empires were characterized by strong central authority, and their legal codes and administrative systems set the standard for the rest of the world. In conclusion, the development of empires in Mesopotamia was a significant turning point in human history. It played a crucial role in the spread of civilization, the advancement of technology, and the growth of trade and commerce.
Learn more about empires in mesopotamia here,
https://brainly.com/question/341555
#SPJ11
separate mechanical electrical and plumbing plans are commonly required for
Answers
Separate mechanical, electrical, and plumbing plans are commonly required for building construction or renovation projects.
These plans provide detailed information and specifications for the respective systems and ensure proper coordination and installation during the construction process. Here's a breakdown of why each plan is necessary:
Mechanical Plans: Mechanical plans focus on the heating, ventilation, and air conditioning (HVAC) systems within the building. They include details such as the location of HVAC equipment, ductwork layout, ventilation requirements, and control systems. These plans help ensure that the building will have efficient and effective heating, cooling, and air circulation.
Electrical Plans: Electrical plans outline the electrical system for the building, including the placement of outlets, switches, lighting fixtures, and electrical panels. They provide information on wiring, circuitry, electrical loads, and safety measures. Electrical plans ensure that the electrical system meets safety codes, handles the expected electrical demands, and facilitates proper functionality throughout the building.
Plumbing Plans: Plumbing plans focus on the water supply, drainage, and plumbing fixtures within the building. They specify the placement of pipes, fixtures, valves, and other plumbing components. Plumbing plans ensure that the plumbing system is designed to meet plumbing codes, optimize water distribution, and efficiently handle wastewater disposal.
Separate plans for each of these systems are required to ensure that all aspects of the building's mechanical, electrical, and plumbing infrastructure are properly coordinated and installed according to industry standards and local regulations. These plans are typically prepared by specialized professionals in each field (mechanical engineers, electrical engineers, and plumbing engineers) to ensure accurate and compliant designs.
Learn more about Electrical here:
https://brainly.com/question/31668005
#SPJ11
6. 35 One lb of water contained in a piston-oylinder ussembly,
initially saturated vapor at 1 atm, is condensed at constant
pressure to saturated liquid. Evaluate the heat transfer, in
Biu, and the entropy production, in Btus'r, for
(a) the water as the system,
(b) an enlarged system consisting of the water and enough
of the nearby surroundings that heat transfer occurs only at
the ambient temperature, 80 F.
Assume the state of the nearby surroundings does not
change during the process of the water, and ignore kinetic
and potential energy
Answers
The heat transfer for (a) water as the system is 165.79 Btu and the entropy production is 0.4855 Btu/R for both (a) and (b) systems.The heat transfer and entropy production are the same as for (a) the water as the system.
To evaluate the heat transfer and entropy production for the given system, we can use the energy and entropy equations.
(a) For the water as the system:
Heat transfer (Q) is the enthalpy change from initial state to final state.
Entropy production (ΔS) is the change in entropy of the system.
Since the water is condensed at constant pressure, the enthalpy change is equal to the heat transfer:
Q
To evaluate the entropy production, we can use the entropy balance equation:
ΔS = m * (s_f - s_i) - Q / T
where m is the mass of water and T is the temperature at which heat transfer occurs.
(b) For the enlarged system:
In this case, the heat transfer occurs only at the ambient temperature, so the heat transfer is given by:
Q = m * Cp * (T_f - T_i)
The entropy production can be evaluated using the entropy balance equation as before:
ΔS = m * (s_f - s_i) - Q / T
where m is the mass of water, Cp is the specific heat capacity, and T is the ambient temperature.
To know more about entropy click the link below:
brainly.com/question/13152763
#SPJ11
What is the primary reason traffic laws exist ?
Answers
Answer:
It's to ensure a driver's safety.
a commercial refrigerator with r-134a as the working fluid is used to keep the refrigerated space at -35 c by rejecting waste heat to cooling water that enters the condenser at 18 c at a rate of 0.25 kg/s and leaves at 26 c. the refrigerant enters the condenser at 1.2 mpa and 50 c and leaves at the same pressure subcooled by 6 c. if the compressor consumes 3.3 kw of power , determine (a) the mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.
Answers
At 1.2mpa pressure and 50c
What is pressure?
By pressing a knife against some fruit, one can see a straightforward illustration of pressure. The surface won't be cut if you press the flat part of the knife against the fruit. The force is dispersed over a wide area (low pressure).
a)Mass flow rate of the refrigerant
Therefore h1= condenser inlet enthalpy =278.28KJ/Kg
saturation temperature at 1.2mpa is 46.29C
Therefore the temperature of the condenser
T2 = 46.29C - 5
T2 = 41.29C
Now,
d)power consumed by compressor W = 3.3KW
Q4 = QL + w = Q4
QL = mR(h1-h2)-W
= 0.0498 x (278.26 - 110.19)-3.3
=5.074KW
Hence refrigerator load is 5.74Kg
(COP)r = 238/53
(Cop) = 4.490
Therefore the above values are the (a) mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.
To learn more about pressure
https://brainly.com/question/13717268
#SPJ4