An electronic device exhibits a bathtub hazard rate profile. Assuming the hazard rate function is given as follows, where t is units of months:
[0.1-0.004t, 0≤t<10] [0.06, 10≤t<100]
[0.06+0.002(t-100), t≥100]
(b) i Find H (t) for the three phases respectively. ii Find R (t) for the three phases as well.
Answers
The hazard rate function for an electronic device with a bathtub hazard rate profile is given as follows:
- For 0 ≤ t < 10 months, the hazard rate H(t) decreases linearly from 0.1 to 0.004t.
- For 10 ≤ t < 100 months, the hazard rate remains constant at 0.06.
- For t ≥ 100 months, the hazard rate increases linearly from 0.06 to 0.06 + 0.002(t - 100) i. In the first phase (0 ≤ t < 10), the hazard rate H(t) is given by H(t) = 0.1 - 0.004t. ii. In the second phase (10 ≤ t < 100), the hazard rate H(t) remains constant at H(t) = 0.06. iii. In the third phase (t ≥ 100), the hazard rate H(t) is given by H(t) = 0.06 + 0.002(t - 100). To find the reliability function R(t), we can integrate the hazard rate function. However, without specific initial conditions, it is not possible to determine the exact reliability function.
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Related Questions
Where you attend college could costmore to borrow and refinance loans
Answers
Purely resistive loads of 24 kW, 18 kW, and 12 kW are connected between the neutral
and the red, yellow and blue phases respectively of a 3-0, four-wire system. The line
voltage is 415 V. Calculate:
i. the current in each line conductor (i.e., IR ,Iy and IB); and
ii. the current in the neutral conductor.
Answers
Answer:
(i) IR = 100.167 A Iy = 75.125∠-120 IB = 50.083 ∠+120 (ii) IN =43.374∠ -30°
Explanation:
Solution
Given that:
Three loads 24 kW, 18 kW, and 12 kW are connected between the neutral.
Voltage = 415V
Now,
(1)The current in each line conductor
Thus,
The Voltage Vpn = vL√3
Gives us, 415/√3 = 239.6 V
Then,
IR = 24 K/ Vpn ∠0°
24K/239.6 ∠0°= 100.167 A
For Iy
Iy = 18k/239. 6
= 75.125A
Thus,
Iy = 75.125∠-120 this is as a result of the 3- 0 system
Now,
IB = 12K /239.6
= 50.083 A
Thus,
IB is =50.083 ∠+120
(ii) We find the current in the neutral conductor
which is,
IN =Iy +IB +IR
= 75.125∠-120 + 50.083∠+120 +100.167
This will give us the following summation below:
-37.563 - j65.06 - 25.0415 +j 43.373 + 100.167
Thus,
IN = 37.563- j 21.687
Therefore,
IN =43.374∠ -30°
An engineer is designing a database for college course information and has created the following tables.
Major ID Major Name
10299313 Physics
10234952 Music
Class ID Class Name Major ID
58995855 Astronomy 10299313
58993213 Fine Art 10234952
In the above excerpt, the bolded Major ID field is an example of which of the following?
Network
Source
Relationship
Record
Answers
The bolded Major ID field is an example of a Relationship in the given excerpt. So, the correct answer is Relationship.
The relationship is defined as the link between the tables in a database. The relationship between tables is established by matching the data in key columns, also called linked fields or join queues. The relationship allows data from different tables to be combined and presented as a single view. A primary ID is assigned to a specific major; for example, 10299313 is assigned to Physics, and 10234952 is set to Music in the excerpt. The Major ID field links or establishes a relationship between the tables in the database. Thus, the bolded Major ID field is an example of a Relationship in the given excerpt.
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a recent engineering graduate designs a small steel structure for a client using educational structural design software leftover from college. he later learns that the software gives accurate stress analysis for tension, but does not properly predict buckling of columns in compression. he purchases the professional version and a revised analysis shows that the building is not as safe as first believed. a large snowfall would create a static load that could cause the supporting columns to buckle and the building to collapse. the probability of this snowfall occurring is once every 10 years. what should the engineer do?
Answers
In order to make the structure safe in the case of a significant snowfall, the engineer should warn the customer of the hazards associated with the design and suggest that it be strengthened or rebuilt. The engineer should also advise the client to think about acquiring more reliable structural design tools for future projects.
What is software?
Software is a group of computer programmes, along with related documentation and data. The system, which carries out the work, has been constructed. Executable code is the lowest level of programming, and it consists of machine instructions that are supported by a single processor, usually a central processing unit (CPU) or (GPU).
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which activity promotes the preservation of species
Answers
Answer:
A
Explanation:
In-situ conservation is the practice of keeping living things in their natural habitats. In the process, the natural surroundings or ecosystem is preserved and protected in order to benefit and conserve all the constituent species, whether they are known or undiscovered.
What activity promotes the preservation of species?Wildlife conservation helps to maintain and preserve many species of animals, plants, and their natural habitats. If we keep protecting wildlife, future generations will be able to enjoy our natural world and the incredible creatures that live there.
A fantastic method to protect the natural habitat of nearby animals is to grow native plants in your garden or on any land you own. In addition to benefiting the animals' population, this helps prevent the spread of exotic species, which harms the local fauna.
Therefore, In-situ conservation activity promotes the preservation of species.
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The term route of entry on an SDS refers to the way a _____ enters the body
Answers
Answer:
No matter what u post on a football page, some fatherless dude will either say "pessi" or "penaldo"
need urgent help!!
Determine the point(s) P on the line e with equation x−6 = ( y−3)/4 = ( 1−z)/3
for which the line connecting P with Q(2, −6, 5) is perpendicular to e.
Answers
The quartiles divide a set of observations into four portions, each representing 25% of the observations, together with the minimum and maximum values of the data set. The interquartile range, a measurement of variation around the median, is calculated using quartiles.
How are quartiles determined?In order to quartile a set of data with n items (numbers), we choose the n/4th, n/2nd, and n/4th items. Interpolation between the adjacent items is used if indexes n/4, n/2, or 3n/4 are not integers.For instance, the first quartile Q1 of ordered data is the 25th item, the second quartile Q2 is the 50th item, and the third quartile Q3 is the 75th item. The fourth quartile Q4 would be the highest item of data, and the zeroth quartile Q0 would be the minimum item; however, these extreme quartiles are referred to as the minimum and maximum of a set, respectively.Calculation:Statistical file: {2, -6, 5}
Quartile Q1: -6
Quartile Q2: 2
Quartile Q3: 5.
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a cloud of 2.5x10^19 electrons move past a given point every 2 seconds. how much is the intensity of the electron flow?
Answers
Answer:
I = 2 A
Explanation:
Given:
N = 2.5·10¹⁹ electrons
| e | = 1.6·10⁻¹⁹ С - electron charge modulus
t = 2 s
_______________
I - ?
Charge:
q = N·| e | = 2.5·10¹⁹·1.6·10⁻¹⁹ = 4 С
Current strength:
I = q / t = 4 / 2 = 2 A
Anybody know anything?
Answers
Answer:
1. Be sure to use the correct type and size of screwdriver on every kind of screw to avoid injury to yourself or damage to equipment.
2. It is also unsafe to carry screwdrivers in pockets or to use them around moving machinery.
3. Screwdrivers are not safe to use as hammers or chisels or for prying.
Explanation:
The accompanying specific gravity values describe various wood types used in construction. 0.320.350.360.360.370.380.400.400.40 0.410.410.420.420.420.420.420.430.44 0.450.460.460.470.480.480.490.510.54 0.540.550.580.630.660.660.670.680.78 Construct a stem-and-leaf display using repeated stems. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.)
Answers
Answer:
\(\begin{array}{ccc}{Steam} & {\vert} & {Leaf} \ \\ \\ {0.3} & {\vert} & {2\ 5\ 6\ 6\ 7\ 8} \ \\ \\{0.4} & {\vert} & {0\ 0\ 0\ 1\ 1\ 2\ 2\ 2\ 2\ 2\ 3\ 4\ 5\ 6\ 6\ 7\ 8\ 8\ 9} \ \\ \ \\ {0.5} & {\vert} & {1\ 4\ 4\ 5\ 8} \ \\ \ \\ {0.6} & {\vert} & {3\ 6\ 6\ 7\ 8} \ \\ \ \\ {0.7} & {\vert} & {8} \ \ \end{array}\)
Explanation:
Given
\(0.32,\ 0.35,\ 0.36,\ 0.36,\ 0.37,\ 0.38,\ 0.40,\ 0.40,\ 0.40,\ 0.41,\)
\(0.41,\ 0.42,\ 0.42,\ 0.42,\ 0.42,\ 0.42,\ 0.43,\ 0.44,\ 0.45,\ 0.46,\)
\(0.46,\ 0.47,\ 0.48,\ 0.48,\ 0.49,\ 0.51,\ 0.54,\ 0.54,\ 0.55,\)
\(0.58,\ 0.63,\ 0.66,\ 0.66,\ 0.67,\ 0.68,\ 0.78.\)
Required
Plot a steam and leaf display for the given data
Start by categorizing the data by their tenth values:
\(0.32,\ 0.35,\ 0.36,\ 0.36,\ 0.37,\ 0.38.\)
\(0.40,\ 0.40,\ 0.40,\ 0.41,\ 0.41,\ 0.42,\ 0.42,\ 0.42,\ 0.42,\ 0.42,\)
\(0.43,\ 0.44,\ 0.45,\ 0.46,\ 0.46,\ 0.47,\ 0.48,\ 0.48,\ 0.49.\)
\(0.51,\ 0.54,\ 0.54,\ 0.55,\ 0.58.\)
\(0.63,\ 0.66,\ 0.66,\ 0.67,\ 0.68.\)
\(0.78.\)
The 0.3's is will be plotted as thus:
\(\begin{array}{ccc}{Steam} & {\vert} & {Leaf} \ \\ {0.3} & {\vert} & {2\ 5\ 6\ 6\ 7\ 8} \ \ \end{array}\)
The 0.4's is as follows:
\(\begin{array}{ccc}{Steam} & {\vert} & {Leaf} \ \\ {0.4} & {\vert} & {0\ 0\ 0\ 1\ 1\ 2\ 2\ 2\ 2\ 2\ 3\ 4\ 5\ 6\ 6\ 7\ 8\ 8\ 9} \ \ \end{array}\)
The 0.5's is as follows:
\(\begin{array}{ccc}{Steam} & {\vert} & {Leaf} \ \\ {0.5} & {\vert} & {1\ 4\ 4\ 5\ 8} \ \ \end{array}\)
The 0.6's is as thus:
\(\begin{array}{ccc}{Steam} & {\vert} & {Leaf} \ \\ {0.6} & {\vert} & {3\ 6\ 6\ 7\ 8} \ \ \end{array}\)
Lastly, the 0.7's is as thus:
\(\begin{array}{ccc}{Steam} & {\vert} & {Leaf} \ \\ {0.7} & {\vert} & {8} \ \ \end{array}\)
The combined steam and leaf plot is:
\(\begin{array}{ccc}{Steam} & {\vert} & {Leaf} \ \\ \\ {0.3} & {\vert} & {2\ 5\ 6\ 6\ 7\ 8} \ \\ \\{0.4} & {\vert} & {0\ 0\ 0\ 1\ 1\ 2\ 2\ 2\ 2\ 2\ 3\ 4\ 5\ 6\ 6\ 7\ 8\ 8\ 9} \ \\ \ \\ {0.5} & {\vert} & {1\ 4\ 4\ 5\ 8} \ \\ \ \\ {0.6} & {\vert} & {3\ 6\ 6\ 7\ 8} \ \\ \ \\ {0.7} & {\vert} & {8} \ \ \end{array}\)
Wastewater flows into a _________ once it is released into a floor drain.
A) HoseB) Covered containerC) Sump pitD) Bucket
Answers
Answer:
a
Explanation:
Wastewater flows into a sump pit once it is released into a floor drain.
For better understanding, lets understand what wastewater means
Wastewater are water that are not needed or have been use and therefore they are disposed. Waster water often contains waste product of man such as food waste,feaces etc.Sump is simply known as a basin into which groundwater is channeled to. A sump pit is commonly known as a temporary pit that is fixed to trap and filter water for carrying or pumping into a design discharge area.From the above, we can therefore say that the answer that Wastewater flows into a sump pit once it is released into a floor drain is correct
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For a brass alloy, the following engineering stresses produce the corresponding plastic engineering strains prior to necking:
Engineering Stress (MPa) Engineering Strain
315 0.105
340 0.220
On the basis of this information, compute the corresponding true stresses and true strains.
Answers
Answer:
The engineering stress necessary to produce an engineering strain of 0.28 is 339 MpaExplanation:
On the basis of this information, we are going to compute the engineering stress necessary to produce an engineering strain of 0.28.
Engineering Engineering Stress (MPa) Strain315 0.105 340 0.220For clarity and you will find the solving in the attached file for your reference.
should you need further information do let me know.
According to the article "Edward R. Murrow: Inventing Broadcast Journalism," how did Murrow perceive the threat of Adolf Hitler?
a. Murrow was cautious towards Hitler, unwilling to ruffle the "powers that be."
b. Murrow did not know Hitler personally, and refused to comment on his politics.
c. Murrow downplayed Hitler's threat, reasoning that Germany was 4,000 miles away
d. To Murrow, Hitler was a threat to all of civilization
Answers
Answer:
d. To Murrow, Hitler was a threat to all of civilization
Explanation:
For Murrow, Hitler's rise was a serious problem and a major threat to the entire civilization. For this reason, he believed that covering news about Hitler's advance and the battles of Nazi Germany was essential, even if the American population did not see Hitler as a threat and the European population, believed that these reprotations were only a way to denigrate the image of the continent to the world.
For Murrow reporting on Hitler's actions was as important as reporting on natural disasters.
The largest class of errors in software engineering can be attributed to _______.
Answers
Answer:
improper imput validation
Explanation:
Urgent!!!
List the assumptions that can be taken into account in torsion analysis.
Answers
Answer:
Explanation:
In the development of a torsion formula for a circular shaft, the following assumptions are made: Material of the shaft is homogeneous throughout the length of the shaft. Shaft is straight and of uniform circular cross section over its length. Torsion is constant along the length of the shaft.
Which of the following statements is NOT true regarding the use of headlights?
Which of the following statements is NOT true regarding the use of headlights?
Low-beams are used in city driving and driving in traffic on roadways.
Low-beams are used when traveling in fog, rain, or snow.
High-beams are used for open country driving when there is no traffic in sight.
High-beams are used when traveling behind other vehicles
Answers
The statement that is NOT true regarding the use of headlights is "High-beams are used when traveling behind other vehicles."
Headlights are an essential component of every vehicle. They serve as safety equipment, allowing drivers to see the road and other vehicles while also alerting other drivers to their presence. When driving in low-light situations, using headlights becomes even more critical
. Headlights come in two types: low-beams and high-beams.
Low-beams are used in city driving and driving in traffic on roadways. They are also used in inclement weather, such as rain, fog, or snow. Low-beams are designed to light up the road in front of the vehicle while not blinding other drivers on the road.High-beams are used for open country driving when there is no traffic in sight
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Beginning with model year 2008, what type of communication protocol is required for diagnostics?
Answers
Beginning with model year 2008, Controller Area Network (CAN) is required for diagnostics.
What is diagnostics?Diagnostics are defined as the process of identifying an injury, ailment, or disease based on the symptoms and signs a person is exhibiting. In order to confirm or rule out illnesses and diseases, diagnostic tests are utilized. Before creating a treatment plan, your doctor needs particular information from a diagnostic test to make an accurate diagnosis.
The robust automotive bus standard known as a Controller Area Network (CAN) enables microcontrollers and other devices to interact with each other's applications without the need for a host computer. Devices and CAN busses are frequently found in industrial and automotive systems. Bosch created the Controller Area Network (CAN) bus, which saw its debut in manufacturing in 1991.
Thus, beginning with model year 2008, Controller Area Network (CAN) is required for diagnostics.
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tech a says that many wheels use a tapered hole that matches the tapered end of the lug nut and centers the wheel on the wheel flange. tech b says that manufacturers usually suggest tightening wheel lugs in a circular pattern. who is correct? group of answer choices tech a tech b both techs a and b neither tech a nor b
Answers
According to Tech A, many wheels have a tapered hole that centers the wheel on the wheel flange and matches the lug nut's tapered end. Tech A has it right.
How Do Brake Line Fittings Be Tested?The brake line needs to be replaced if it is leaking. A closed hydraulic system is the only one that works well. Fluid or air leaks from the system can limit its capabilities, resulting in soft brakes or none at all.
Like removing a bolt from a nut, removing a brake line is simple. However, just because it's easy doesn't mean it's easy. Road debris and corrosion caused by salt, water, and galvanic reactions can harm brake fittings. Although anodized to prevent rust and corrosion, the majority of fittings are steel and can and do corrode.
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Which of the following is a problem that can occur when using an induction coil to harden parts?
O Frictional heat
O Hydrogen embrittlement
Residual stress
Shifting position
Answers
Answer:
I would pick last or first.
I'M SO SO SORRY F IT WRONG!!
A problem that can occur when using an induction coil to harden parts is known as Residual stress. Thus, the correct option for this question is C.
What is an Induction coil?An induction coil may be defined as a kind of electrical transformer that is utilized in order to manufacture high-voltage pulses from a low-voltage direct current (DC) supply. It is also known as a spark coil.
An induction coil is a type of electrical device which is significantly used for generating an intermittent source of high voltage through the direct current. When this approach is applied for hardening parts, a problem may occur which is demonstrating the residual stress on the parts which are usually hardened via induction coil.
Therefore, a problem that can occur when using an induction coil to harden parts is known as Residual stress. Thus, the correct option for this question is C.
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14.13 compare thermoplastic and thermosetting polymers (a) on the basis of mechanical characteristics upon heating and (b) according to possible molecular structures.\
Answers
Thermoplastics become softer when heated and firmer when they cool. however when they are heated, thermosetting polymers become harder.
a. The thermoset polymer can only be heated once; once heated, it cannot be reheated to allow for further molding. This polymer becomes stronger when heated. The chemical composition of thermoplastic polymers, on the other hand, is unaffected by repeated heating and remolding.
b. In contrast to thermoplastic polymers, which have a linear and flexible structure that allows for molding and reheating, thermoset polymers have strong covalent cross connections in their molecular structure.
The main distinction between the two is that thermoset, a material that becomes stronger when heated, cannot be remolded or heated once it has been formed, whereas thermoplastics may be warmed, remolded, and cooled as needed without resulting in any chemical changes.
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a portion of the keystone pipeline connecting oil production in canada and refining in the united states consists of a 0.76 m diameter pipe that carries 500,000 bbl of crude oil per day over a distance of 1744 km. calculate the average velocity (in m/s) of the oil in the pipe. hint: 500,000 bbl of oil has a volume of (500,000 bbl)×(158.97 l/bbl)/(1000l/m^3)
Answers
The average velocity (in m/s) of the oil in the pipe is 2.04m/s.
What is the velocity?It should be noted that from the information, the oil that is transported on a day = 500000 bbl. Based on the information given, this is equal to 79491.256 cubic meter.
It should be noted that the flow rate will be calculated as:
= Oil transported / Time taken
= 79491.256 / (24 × 60 × 60)
= 0.92m³ per second
It should be noted that the area will be calculated as:
A = πr²
where
π = 3.14
r = radius = Diameter / 2 = 0.76/2 = 0.38
Area = πr² = 3.14 × (0.34)² = 0.45m²
Now, the velocity will be calculated thus:
= Flow rate / Area
= 0.92 / 0.45
= 2.04m/s
In conclusion, the velocity is 2.04m/s.
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A(n) ____ is used on reservoirs to allow the tank to take in or release air as the fluid level changes during system operation.
Answers
A(n) breather vent is used on reservoirs to allow the tank to take in or release air as the fluid level changes during system operation.
Answer:
Vent / Breather Vent
In this worksheet, we will use the drag equations to calculate drag force. Assume the following:
1 liter bottle with radius = 40 mm.
The drag coefficient is 0.299 for the 150 mm long nose cone.
Velocity is 30 m/s.
Answers
Answer:
Explanation:
plz provide the density
w/ density, the drag force can be calculated:
drag force = drag coefficient * cross-section area * .5 * density * Velocity^2
where drag coefficient is given as 0.299,
cross-section area = 3.14*0.04^2
Velocity given as 30
Answer:
Explanation:
Drag force is given by the equation: 1/2 * drag coefficient * density * area * velocity^2.
So drag force = 1/2 * 0.299 * density * 3.14 * (40/1000)^2 * 30^2
What did the US and USSR agree on in the INF Treaty? They agreed to reduce nuclear weapons. They agreed that new European nations would be democratic. They agreed to tear down the Berlin Wall. They agreed that the USSR should break into several countries.
Answers
Answer:
they agreed to reduce nuclear weapons
Answer:
A
Explanation:
Edu 2023
From your own point of view, what can be done to improve the different engineering processes that will impact the environment less negatively? Give examples and write a 500-word essay. Use Passive in
Answers
Engineering processes can be improved to minimize their negative impact on the environment by implementing sustainable practices, incorporating cleaner technologies, and adopting efficient resource management strategies.
How can engineering processes be enhanced to reduce their environmental impact?To mitigate the adverse effects of engineering processes on the environment, it is crucial to embrace sustainable practices that prioritize environmental conservation and resource preservation. One key aspect is the adoption of cleaner technologies, such as renewable energy sources and low-emission manufacturing processes. For instance, transitioning from fossil fuel-based energy to solar or wind power can significantly reduce greenhouse gas emissions. Additionally, implementing advanced filtration systems and treatment methods can minimize the release of harmful pollutants into the air or water.
Efficient resource management is another essential factor in reducing environmental impact. This involves optimizing the use of materials and minimizing waste generation throughout the engineering lifecycle. Engineers can achieve this by employing techniques like life cycle assessment, which assesses the environmental impact of a product or process from its creation to disposal. By identifying areas of inefficiency or waste generation, engineers can design more sustainable solutions that prioritize resource conservation and minimize environmental harm.
Moreover, fostering innovation and collaboration among engineers, scientists, and policymakers is crucial for driving positive change. By promoting interdisciplinary research and knowledge sharing, stakeholders can collectively identify and implement innovative solutions that address environmental challenges. For example, engineers can develop technologies that capture and store carbon emissions or design eco-friendly materials with reduced environmental footprints.
In conclusion, improving engineering processes to minimize their negative environmental impact requires a multifaceted approach. By embracing sustainable practices, incorporating cleaner technologies, and implementing efficient resource management strategies, engineers can contribute to a more sustainable and environmentally friendly future.
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Which of the following group scopes can contain objects from any domain within the forest? (Choose all that apply.)
a. Global
b. Domain local
c. Distribution
d. Universal
Answers
The group scopes that can contain objects from any domain within the forest are global and universal.
Group scopes that can contain objects from any domain within the forest:
a. Global
d. Universal
Global and universal group scopes can both contain objects from any domain within the forest.
Global groups are used to organize user accounts and groups from a single domain. They can be assigned permissions and access to resources within any domain in the forest.
Universal groups, on the other hand, have a broader scope and can contain objects from any domain within the forest. They are typically used to assign permissions and access across multiple domains in a forest.
Domain local groups are limited to a single domain and are used for assigning permissions and access within that specific domain.
Distribution groups are not specifically related to domain-wide scopes but rather used for email distribution lists in certain messaging systems.
In summary, the group scopes that can contain objects from any domain within the forest are global and universal.
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Find i0(t) for t>0 in the circuit.
Answers
Answer:
(b) io(t) = -6e^(-3000t) mA, t > 0
Explanation:
The inductor current at t=0 is 12 V/(2 kΩ) = 6 mA. When the switch is opened, that same current will continue to flow in the loop on the left. Its direction will continue to be down through the inductor, so in the negative direction with respect to the way io is defined.
This already tells you the correct answer choice: B.
__
The circuit time constant is L/R = (2 H)/(6 kΩ) = 1/3000 seconds. The exponent of the exponential decay will be t divided by this, or -3000t, also in agreement with choice B.
A four-cylinder four-stroke engine is modelled using the air standard Otto cycle (two engine revolutions per cycle). Given the conditions at state 1, total volume (V1) of each cylinder, compression ratio (r), rate of heat addition (Q), and engine speed in RPM, determine the efficiency and other values listed below. The gas constant for air is R =0.287 kJ/kg-K.
T1 = 300 K
P1 = 100 kPa
V1 = 500 cm^3
r = 10
Q = 60 kW
Speed = 5600 RPM
Required:
a. Determine the total mass (kg) of air in the engine.
b. Determine the specific internal energy (kJ/kg) at state 1.
c. Determine the specific volume (m^3/kg) at state 1.
d. Determine the relative specific volume at state 1.
Answers
Answer:
a) Mt = 0.0023229
b) = U1 = 214.07
c) = V₁ = 0.861 m³/kg
d) = Vr1 = 621.2
Explanation:
Given that
R = 0.287 KJ/kg.K, T1 = 300 K , P1 = 100 kPa , V1 = 500 cm³, r = 10 , Q = 60 kW , Speed N = 5600 RPM, Number of cylinders K = 4
specific heat at constant volume Cv = 0.7174 kJ/kg.K
Specific heat at constant pressure is 1.0045 Kj/kg.K
a) To determine the total mass (kg) of air in the engine.
we say
P1V1 = mRT1
we the figures substitute
(100 x 10³) ( 500 x 10⁻⁶) = m ( 0.287 x 10³) ( 300 )
50 = m x 86100
m = 0.00005 / 86100 = 0.0005807 ( mass of one cylinder)
Total mass of 4 cylinder
Mt = m x k
Mt = 0.0005807 x 4
Mt = 0.0023229
b) To determine the specific internal energy (kJ/kg) at state 1
i.e at T1 = 300
we obtain the value of specific internal energy U1 at 300 K ( state 1) from the table ideal gas properties of air.
U1 = 214.07
c) To determine the specific volume (m³/kg) at state 1.
we say
V₁ = V1/m
V₁ = (500 x 10⁻⁶) / 0.0005807
V₁ = 0.861 m³/kg
d) To determine the relative specific volume at state 1.
To obtain the value of relative specific volume at 300 K ( i.e state 1) from the table ideal gas properties of air.
At T1 = 300 k
Vr1 = 621.2
_____________ processes are actions that create physical solutions to problems.
a
Production Processes
b
Medical Processes
c
Agricultural Processes
d
Communication Process
Answers
Answer:
yes answer d is correct
Communication Process are actions that create physical solutions to problems. The correct option is d.
What is Communication Process?Human existence and organisational survival both depend on effective communication. It is a process of generating and disseminating thoughts, facts, opinions, and sentiments from one place, individual, or group to another. The Management function of Directing depends on effective communication.
The sending party, message encoding, channel selection, message receipt by the recipient, and message decoding are all aspects of the communication process.
Feedback is when the recipient communicates something back to the original sender. These procedures are actions that result in tangible fixes for issues.
Thus, the correct option is d.
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Which of the following power tools has a revolving vertical shaft and a cutter? *
1 point
a) saber saw
b) router
c) miter saw
d) circular saw
Answers
The tool that has a revolving vertical shaft and a cutter is a router. The correct option is b.
What are power tools?There are many different kinds of power tools, including portable power tools like a circular saw, heat guns, and wall chasers as well as electrical power tools like impact wrenches, lathes, power drills, power ratchet sets, and power saws.
Power tools including circular saws, jigsaws, drills, hammer drills, sanders, grinders, routers, and many others reduce labor and time requirements. The requirement for knowledge of the risks that power tools provide if used improperly is raised due to their rising use.
A power tool called a router has a flat base and a spinning blade that protrudes beyond the base. An electric motor or a pneumatic motor can drive the spindle.
Therefore, the correct option is b) router.
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