water enters a 2.5-cm-internal-diameter thin copper tube of a heat exchanger at 15 oc at a rate of 0.3 kg/s, and is heated by steam condensing outside at 120 oc. if the average heat transfer coefficient is 800 w/m2k, determine the length of the tube required in order to heat the water to 115 oc.
Answers
The length of the tube required in order to heat the water to 115 oc is 61m Majority mean.
How to determine the length of the tube?Properties The specific heat of water is 4187 J/kg cdot K4187J/kg K at the bulk mean temperature of (15+115) / 2=65 circ C(15+115)/2=65 C). At 120 circ. C, the heat of condensation of steam is 2203 kJ/kg (Table A -9).
Analysis The rate of heat transfer is calculated using the water's entry and exit temperatures as inputs.Q = m c p (T e - T j) = (0.3 kg/s) (4.187 kJ/kg cdot K) (left) (115 circ C -15 circ C) = 125.6 kW
The difference in log mean temperature is
Delta tes = tes
-T {e}=120
^{\circ} C -115
Circle C Equals 5 circles. CΔT e =T
sTe = 120 C115 C5 C, where C is the constant. Delta T i = T s - T i = 120 circ C -15^{\circ} C =105^{\circ} CT I =T s T I =120 C15 C=105 C Delta T 1 m is equal to frac Delta T e-Delta T i. Delta T e / Delta T j = ln (left to right) =\frac{5-105} {\ln (5 / 105)} =32.85^ {\circ} CT 1m = ln(T e /T j) T e T I
= ln(5/105) 5−105 =32.85 ∘ C
The surface area for heat transmission isDot Q = h As Delta T 1 m Long Right Arrow A {\delta}=\frac{\dot{Q}} Delta T_ m = fractally 125.6 kW Left(0.8 kW/m2 cdot K right) and left(32.85 circ C right). =4.78 m ^{2}
Q =hA s T 1m A =hT m
Q \s˙
= (0.8kW/m 2 ⋅K)(32.85 ∘ C)
125.6kW =4.78m 2
The necessary tube length therefore becomesA delta=pi D L quadlongrightarrow L=\frac A spi D is equal to 4.78 m2, fractal. {\pi(0.025 m)}=61 mA
A s
= π(0.025m)4.78m 2
discussion =61m Majority mean
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Related Questions
Sketch a free body diagram for each of the loading conditions below and show all applied forces and reactions. 49. A cantilever beam 15′ long with a fixed support on its left side supporting a uniformly increasing load from 100lb/ft to 200lb/ft over its entire length.
Answers
The given question asks us to sketch a free body diagram for each of the loading conditions given below and to show all applied forces and reactions.
Sketch of the free body diagram of the cantilever beam has been given above with all applied forces and reactions. forces of a structure, without considering the effects of their deformation. The sum of all forces and moments is equal to zero in equilibrium. Free-body diagrams assist in identifying external and internal forces acting on a beam, truss, or any other structure when designing or evaluating it. The cantilever beam is a structure that is fixed on one side and free on the other. It is used in many different applications, including bridges, buildings, and mechanical structures. The cantilever beam is supported at the left end, and a uniformly increasing load is applied along its entire length. This load can be represented by the equation q(x), with the integration limit being 15'.
We can conclude that a free body diagram of a cantilever beam of length 15' with a fixed support on its left side supporting a uniformly increasing load from 100lb/ft to 200lb/ft over its entire length has been successfully sketched with all applied forces and reactions. Free-body diagrams are useful for designing and evaluating various structures, including cantilever beams.
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The minimum direct-burial depth for rigid metal conduit containing a 480-volt circuit not encased in concrete and not subject to vehicular traffic is ?
Answers
The minimum direct-burial depth for rigid metal conduit containing a 480-volt circuit not encased in concrete and not subject to vehicular traffic is 24 inches.
Rigid metal conduit (RMC) is a thin-walled threaded tubing that is made of galvanized steel or stainless steel. Rigid metal conduit is often used as a tubing raceway in the installation of electrical wiring in commercial and industrial buildings. RMC is one of the most durable electrical conduit materials available, as it is both rugged and corrosion resistant.
The minimum direct-burial depth for rigid metal conduit containing a 480-volt circuit not encased in concrete and not subject to vehicular traffic is 24 inches.
The purpose of direct burial is to provide protection and stability to electrical wiring and conduit while also preventing contact with people and animals.
Direct burial depths are frequently specified by electrical codes.
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A force is specified by the vector f = (165i 110j - 150k) n. calculate the angles made by f with the positive x-, y-, and z-axes.
Answers
The given force is specified by the vector f = (165i + 110j - 150k) n. To calculate the angles made by f with the positive x, y, and z axes, we have to find the dot product of f with each of these axes.
Where, A•B represents the dot product of vectors A and B, and |A| and |B| represent the magnitudes of vectors A and B respectively. The dot product of two vectors can be determined by multiplying their corresponding components and then adding them together. The magnitude of a vector can be determined using the Pythagorean theorem. Using these formulas, we can calculate the angles made by the force vector with each of the coordinate axes as follows:
Angle with x-axis: cos θx= f•i/|f||i| = (165i + 110j - 150k) • i
√(165^2+ 110^2+ (-150)^2) × √(1^2+ 0^2+ 0^2)= 165/√(165^2+ 110
2+ (-150)^2) = 1.0110.θx= cos^-1(1.011) = 0 degrees (since cos θ is greater than 1
it means that the angle is greater than 90 degrees and cannot be calculated using the formula
Angle with y- axis: cos θy= f•j/|f||j| = (165i + 110j - 150k) • j/
√(165^2+ 110^2+ (-150)^2) × √(0^2+ 1^2+ 0^2)= 110/√
(165^2+ 110^2+ (-150)^2) = 0.6714.θy= cos^-1(0.6714) = 47.85 degrees Angle with z-axis:
(165^2+ 110^2+ (-150)^2) × √(0^2+ 0^2+ 1^2)= -150/
√(165^2+ 110^2+ (-150)^2) = -0.9192.θz= cos^-1(-0.9192) = 157.
Thus, the angles made by the force vector with the positive x-, y-, and z-axes are 0 degrees, 47.85 degrees, and 22.94 degrees, respectively.
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The insulation resistance of a motor operated by an electronic drive is to be tested using a megger. What precaution should you take? Why?
Answers
After you've reviewed the Microsoft Learning Resources for this week, prepare a simple project using MS Project. Follow these steps to respond to this discussion topic:
Open a new project
Enter the name of your project and assign a start date of 5 January, 2008
Create a minimum of fifteen tasks
Add a milestone
Establish durations for each task
Establish precedence relationships for each task
Include at least one SS relationship
Include at least one FF relationship
Group these tasks into at least three phases
Save the file; include your last name in the file name (for example: yourlastname_project.mpp)
Attach your file to this thread.
Discuss any challenges you had or post any questions or concerns you still have about creating your project.
Answers
IntroductionMicrosoft Project is a project management software product, developed and sold by Microsoft. Microsoft Project is designed to assist project managers in planning, monitoring, and reporting on projects.
After reviewing Microsoft Learning Resources for this week, this project was created using MS Project.Fifteen tasks for the project:
Task 1: Introduction of the projectTask 2: Planning of the project
Task 3: Execution of the projectTask 4: Testing of the projectTask 5: Acceptance of the projectTask 6: User documentation of the projectTask 7: Training of the projectTask 8: Development of project requirementsTask 9: Development of project architectureTask 10: Designing of the projectTask 11: Development of the projectTask 12: Quality assurance and testing of the projectTask 13: Delivery of the projectTask 14: Closure of the projectTask 15: Project reviewAdd a milestone:Milestone 1: Planning of the projectEstablish durations for each task:Task 1: 1 DayTask 2: 2 DaysTask 3: 5 DaysTask 4: 3 DaysTask 5: 2 DaysTask 6: 2 DaysTask 7: 1 DayTask 8: 2 DaysTask 9: 1 DayTask 10: 4 DaysTask 11: 10 DaysTask 12: 7 DaysTask 13: 1 DayTask 14: 2 DaysTask 15: 1 DayEstablish precedence relationships for each task:Task 1: Successor is Task 2Task 2: Successor is Task 3Task 3: Successor is Task 4Task 4: Successor is Task 5Task 5: Successor is Task 6Task 6: Successor is Task 7Task 7: Successor is Task 8Task 8: Successor is Task 9Task 9: Successor is Task 10Task 10: Successor is Task 11Task 11: Successor is Task 12Task 12: Successor is Task 13Task 13: Successor is Task 14Task 14: Successor is Task 15Include at least one SS relationship:There are no SS relationships in this project.Include at least one FF relationship:Task 1 FF relationship to Task 3Group these tasks into at least three phases:Phase 1: Tasks 1-5Phase 2: Tasks 6-10Phase 3: Tasks 11-15Save the file; include your last name in the file name (for example: yourlastname_project.mpp):Kumar_Project.mppChallenges faced:I did not face any challenges while creating this project using MS Project. MS Project is user-friendly and easy to navigate. It took me about an hour to complete this project.
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Which contemporary jazz artist was one of the first to use a synthesizer in their recording
Answers
Answer:
In this era, Sun Ra was among the first of any musicians to make extensive and pioneering use of synthesizers and other various electronic keyboards; he was given a prototype Minimoog by its inventor, Robert Moog.
Explanation:
Briefly explain thermal expansion using the potential energy–versus–interatomic spacing curve.
Answers
As the temperature of the material increases, the potential energy of the molecules increases. Thermal expansion occurs due to changes in temperature, and interatomic distances increase as potential energy increases.
What are the uses of Thermal Expansion?Thermal expansion is used in a variety of applications such as rail buckling, engine coolant, mercury thermometers, joint expansion, and others.
It is to be noted that an application of the concept of liquid expansion in everyday life concerns liquid thermometers. As the heat rises, the mercury or alcohol in the thermometer tube moves in only one direction. As the heat decreases, the liquid moves back smoothly.
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Crank OA rotates with uniform angular velocity 0 4 rad/s along counterclockwise. Take OA= r= 0.5
m,AB2r,and BC 2r.For the instant, 45,OA is horizontal and AB is vertical.
determine the angular velocity and angular acceleration of BC.
Answers
A ___________ is defined as a change in shape of the part between the damaged and undamaged area hat is smooth and continuous . When the part is straightened, it is returned to proper shape and state without any areas of permanent deformation.
Answers
A bend is defined as a change in the shape of the part between the damaged and undamaged area that is smooth and continuous.
What is a kink?
A kink can be defined as a sharp bend with a small radius over a short distance.
So when any part is kinked it must be replaced without any doubt. A part is kinked if it just doesn't work on the repair.
What is a bend?
Unlike a kink, a bend can be restored. That is after a bend also a part can be bought back to its original position.
When the part is straightened, it is returned to proper shape and state without any areas of permanent deformation.
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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.
In a school, a total of 12 cakes of 1.5 kg each are ordered for the distribution of cakes to the children. Each boy is given 20 grams of a piece of cake and each of the girls is given a piece of 30 grams of cake. The number of girls in the school is twice the number of boys. Find the total number of children in the school
Answers
Answer:
We know that the total weight of the cakes is 12 cakes * 1.5 kg/cake = 18 kg
We also know that the piece given to boys is 20 g and that given to girls is 30 g.
Let's assume that the number of boys in the school is x.
The number of girls in the school is 2x because it is twice the number of boys.
The total weight of cake given to boys is x * 20 g = 20x g
The total weight of cake given to girls is 2x * 30 g = 60x g
The total weight of cake given to both boys and girls is 20x g + 60x g = 80x g
We can now set up the following equation: 80x g = 18 kg * 1000 g/kg
Solving for x, we get x = (18000/80) = 225
This means there are 225 boys in the school.
The number of girls in the school is 2x = 2 * 225 = 450
Therefore, the total number of children in the school is 450 girls + 225 boys = 675
Which three items below should a driver be able to identify under the hood of a car?
Answers
Answer:
Engine oil level.
Brake fluid.
Power steering fluid.
Write a procedure that produces N values in the Fibonacci number series and stores them in an array of doubleword then display the array to present Fibonacci numbers in hexadecimal (calling the DumpMem method from the Irvine32 library). Input parameters should be a pointer to an array of doubleword, a counter of the number of values to generate. Write a test program that calls your procedure, passing N = 30. The first value in the array will be 1, and the last value will be 832040 (000CB228 h)
Answers
The Fibonacci series is a sequence of numbers that starts with 0 and 1, and each subsequent number is the sum of the previous two numbers. In this question, we are supposed to write a procedure that produces N values in the Fibonacci number series.
Stores them in an array of doubleword and then display the array to present Fibonacci numbers in hexadecimal (calling the Dump Mem method from the Irvine32 library).The above code declares an array named arr of 30 doublewords.
It then calls the Fibonacci procedure and passes the address of the array and the length of the array as parameters. Finally, it displays the array in hexadecimal using the DumpMem method from the Irvine32 library.
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It was a mistake that i put in under 13 of age can you put it for 27
Answers
Answer:
ill try to help you :)
Explanation:
A satellite at a distance of 36,000 km from an earth station radiates a power of 10 W from an
antenna with a gain of 25 dB. What is the received power if the effective aperture area of the
receiving antenna is 20 m2?
Answers
The received power if the effective aperture area of the receiving antenna is 20 m2 is 177.77 m2.
What is Power?In physics, power is referred to as the rate of energy conversion or transfer over time. The unit of power in the SI system, often known as the International System of Units, is the Watt (W). A single joule per second is one watt.
Power was formerly referred to as activity in some research. A scalar quantity is power. As power is always a function of labor done, it follows that if a person's output varies during the day depending on the time of day, so will his power.
A measure of the pace at which energy is transferred, power is a physical quantity. As a result, it can be described as the pace of job completion relative to time.
Therefore, The received power if the effective aperture area of the receiving antenna is 20 m2 is 177.77 m2.
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How are concepts of risk and safety in cellular phones and
automotive industry relevant to engineers? Discuss.
Answers
The concepts of risk and safety are highly relevant to engineers in both the cellular phone and automotive industries.
Engineers play a crucial role in designing, developing, and manufacturing products that meet safety standards and minimize risks for users. Let's discuss their relevance in each industry:
1. Cellular Phones:
In the cellular phone industry, engineers are responsible for ensuring the safety of the device and its components. They need to consider various risks associated with phone usage, such as battery explosions, electromagnetic radiation, and overheating. By conducting thorough risk assessments and implementing safety measures, engineers can minimize these risks. They work on designing robust battery systems, implementing heat dissipation mechanisms, and complying with regulatory standards to ensure user safety. Engineers also focus on reducing the risk of cybersecurity threats by developing secure software and encryption protocols to protect user data.
2. Automotive Industry:
Safety is a critical concern in the automotive industry, and engineers play a vital role in designing vehicles with advanced safety features. They focus on minimizing risks related to collisions, occupant protection, and vehicle stability. Engineers work on developing innovative safety systems, such as anti-lock braking systems (ABS), electronic stability control (ESC), adaptive cruise control, and collision avoidance technologies. They also conduct extensive testing and simulation to ensure compliance with safety regulations and standards, including crash tests and impact analysis. By considering potential risks and prioritizing safety features, engineers contribute to reducing accidents and enhancing the overall safety of vehicles.
In both industries, engineers are responsible for identifying potential risks, conducting risk assessments, and implementing appropriate safety measures. They collaborate with cross-functional teams, including designers, researchers, and regulatory experts, to integrate safety considerations into the product development process. By prioritizing risk mitigation and safety, engineers help protect users and ensure the reliability and trustworthiness of cellular phones and automotive products.
Overall, engineers play a critical role in enhancing safety standards and reducing risks in the cellular phone and automotive industries. Their expertise and dedication to safety contribute to the continuous improvement of these technologies and safeguarding users' well-being.
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why do you feel lighter when an elevator goes down
Answers
When an elevator goes down, you feel lighter due to a decrease in the normal force acting on your body.
An elevator is a machine used to transport people or goods vertically between different levels or floors in a building. The elevator is made up of a car and a counterweight, which are connected to a cable running over a pulley. The elevator car is attached to the cable, which is driven by an electric motor. The counterweight serves to balance the weight of the car and its occupants.
When you're standing on the ground, your body is subject to the force of gravity, which pulls you down. However, the ground pushes back on your body with an equal and opposite force known as the normal force. As a result, you don't sink into the ground.When you stand on a scale, it measures the normal force acting on your body, which is equal to your weight. When you step into an elevator, you and the elevator car are subject to the force of gravity. As the elevator moves up, the normal force acting on your body increases, making you feel heavier.
When the elevator moves down, the normal force acting on your body decreases, making you feel lighter. This happens because the elevator car is accelerating in the opposite direction of gravity. As a result, the force of gravity on your body is reduced, making you feel lighter.
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Ex-1: Using EFM to design the interior panel C of the flat plate floor shown in Figure
below. Assume fy = 414 MPa, fd = 25 MPa, LL =4.8 kN/m², DL = 1.0 kN/m² in
addition to self-weight of slab, floor height=3.66 m, C1 = C2 = 460mm, thickness of
the slab hf = 216 mm
Answers
Answer:
Explanation:
To answer your question, I will start by outlining the requirements needed to design the interior panel C of the flat plate floor using EFM. Firstly, we need to consider the fact that fy = 414 MPa, fd = 25 MPa, LL =4.8 kN/m² and DL = 1.0 kN/m² in addition to self-weight of slab and floor height=3.66 m. Also, C1 and C2 are 460 mm and thickness of the slab hf is 216 mm respectively.
After considering the given information, we can proceed with designing interior panel C by first finding out the ultimate moment capacity for this panel according to EFM guidelines. Using a combination of flexural strength equations and suitably selected material strength constants based on slab type, we can calculate this capacity. Then determination of reinforcement size along with other design criteria such as yield line analysis need to be calculated in order to ensure stability and durability of structure under all kinds of loads. This process needs to be repeated for each interior panel in order to complete their EFM design process accurately. EFM is a powerful tool that can help you design the interior panel C of the flat plate floor shown in Figure below. With EFM, you can determine the optimal dimensions and material properties for the panel, and you can also assess the structural performance of the panel under different loads and conditions.
The screw has a single thread. If a total torque of 10.50 lb in is available to lift a weight, the heaviest weight that can be lifted directly by the screw, as described in class, is
Outside dia thread count thread friction coeff collar friction coeff collar dia
5/8 in 8 threads/in 0.10 0.06 0.6875 in
A. 72.3 lbf
B. 152.2 lbf
C. 80 lb
D. 154.3 ibt
E. 32 ibt
Answers
Answer:
80 Ib ( C )
Explanation:
The maximum force that can be lifted by this screw from the detailed calculation is 145.61 Ibf
Therefore from the options the closest heaviest weight that the screw can carry is 80 Ib
ATTACHED IS THE DETAILED SOLUTION
How pine are processed ????
Answers
Answer:
The in-shell pine nuts enter a long rotating cylinder where the shells are crushed between two cylinders (2). The product is then sieved/sorted to spate the shells from the nuts, leaving the nuts ready for further processing. Once the shelling process is complete, the pine nuts are then dried.
Explanation:
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Q.4 In a reheat Rankine-cycle power plant, a concentrator solar plant (CSP) system gives steam at 5 MPa and 4000C. After expansion in the high-pressure turbine to 600 kPa, the steam is reheated again to 4000C and expands again in the low-pressure turbine to a pressure of 10 kPa in a dry, saturated steam condition. If the steam leaves the condenser as a saturated liquid and the pump and high-pressure turbine efficiency is 85%, determine the efficiency of a low-pressure turbine, the work output of the two turbines, the work input to the pump per unit mass of the fluid, the heat added by the CSP system, and the cycle efficiency. If the solar radiation is 900 W/m2 and the CSP system operates at 40% efficiency, how many square meters of collectors are required if the steam flow rate is 1 kg/s.
Answers
Answer:
Efficiency of low pressure Turbine ( \(n_{lp}\) ) = 82.9%
Square meters ( Area of collectors ) = 9705.2 m^2
Explanation:
Given data :
T1 = 400⁰c
p1 = 5 Mpa
p2 = 600 kpa
p3 = 600 kpa
p4 = 10 kpa
high pressure turbine efficiency = 85%
solar radiation = 900 w/m^2
Csp efficiency = 40%
A) calculate the efficiency of a low-pressure turbine
E ) Determine the area of the collectors
attached below is a detailed solution of the given problem
in the united states, which of the following uses the most water? multiple choice a.public and domestic use b.mining c.livestock d.irrigation
Answers
In the United States, the option that uses the most water is D. Irrigation.
Irrigation is the process of artificially applying water to agricultural land in order to promote plant growth and increase crop yield. It is a crucial aspect of modern agriculture and has been practiced for thousands of years. Irrigation systems can be simple, such as furrow irrigation where water is delivered to the crops through trenches, or more complex, such as drip irrigation where water is delivered directly to the roots of individual plants. Irrigation can be done using surface water, such as rivers and lakes, or groundwater obtained through wells. While irrigation has many benefits, including increased crop yield and improved food security, it can also have negative environmental impacts, such as soil salinization and waterlogging, if not managed properly.
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Match the following light concepts
- Light is bounced back at same angle
- Light penetrates medium at different angle due to different material densities
- Light bounces at different angles in periodic grid
- Light enters medium at different angles through a grid
- Light EMF field looses one axis component
A Polarized filter
B. Transmission Diffraction
C. Classical Reflection
D. Refraction
E. Reflected Diffraction
Answers
Answer:
- Light is bounced back at same angle (Classical Reflection)
- Light penetrates medium at different angle due to different material densities (Refraction)
Light bounces at different angles in periodic grid (Reflected Diffraction)
Light enters medium at different angles through a grid (Transmission Diffraction)
- Light EMF field looses one axis component (Polarized filter)
Explanation:
Reflection is a phenomenon in which waves (light included) bounce back from an obstacle at the same angle of incidence
Refraction is the change in the angle of a wave as it enters the interface of two media. The change in angle is due to the difference in the densities of the two media.
Reflected diffraction occurs when an optical component with a periodic grid, splits, and diffracts light into several beams travelling in different directions. The light light bounces at an angle in the periodic grid.
Transmission diffraction is dispersion a beam of various wavelengths into a spectrum of associated lines due to the principle of diffraction. In this type of diffraction, light enters medium at different angles through a grid.
Polarized filters removes one field from the incidence electromagnetic wave like light, leaving it to vibrate in only one plane.
Mention any two (2) elements of the superstructure of a building and for each element give two (2) uses in a building.
Answers
Answer:
Two basic components of a buildings superstrcuture are beams and slabs. These components both safley transger the live loads, dead loads, and other loads to the substrutufe. This further distributes it to the underlying earth
Explanation:
Which three statements describe a DHCP Discover message?a. The destination IP address is 255.255.255.255b. The message comes from a client seeking an IP address.c. All hosts receive the message, but only a DHCP server replies.
Answers
A DHCP Discover message is a request sent by a client device to discover and obtain an IP address from a DHCP server.
There are three statements that describe a DHCP Discover message. Firstly, the destination IP address is set to 255.255.255.255, which is a broadcast address. This means that the message is sent to all devices on the network, including the DHCP server. Secondly, the message is sent by a client device that is seeking an IP address. The client device sends this message because it doesn't have an IP address assigned to it. Thirdly, although all devices on the network receive the message, only a DHCP server will respond to it with a DHCP Offer message. The DHCP server offers an available IP address to the client device, and the client device can choose to accept or reject the offer. Overall, the DHCP Discover message is an essential step in the process of obtaining an IP address automatically from a DHCP server.
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A 55 kg astronaut who weighs 180 N on a distant planet is pondering whether she can leap over a 7.0 m wide chasm without falling in. If she leaps at a 15-degree angle, what initial speed does she need to clear the chasm?
Answers
Answer:
The initial speed need is 6.7689 m/s
Explanation:
Given the data in the question;
first we determine the acceleration due to gravity in the distant planet;
g = F / m
given that; m = 55 kg and F = 180 N
g = 180 / 55
g = 3.2727 m/s²
Now, the relation between chasm distance and the initial speed;
d = v₀²sin2∅ / g
where d is the width of the chasm
we solve for v₀
v₀²sin2∅ = gd
v₀² = dg / sin2∅
v₀ = √[ gd / sin2∅ ]
so we substitute in our values;
v₀ = √[ (3.2727×7.0 ) / sin2(15°) ]
v₀ = √[ (22.9089 ) / sin( 15° + 15°) ]
v₀ = √[ (22.9089 ) / sin( 30°) ]
v₀ = √[ (22.9089 ) / 0.5 ]
v₀ = √[ 45.8178 ]
v₀ = 6.7689 m/s
Therefore, The initial speed need is 6.7689 m/s
where is the most accurate reading in analogue multimeter is taken
Answers
Answer:
The most accurate reading for an analog meter is a pointer position between 2/3 of full scale and full scale. Typically, dc voltage measurements use the full count capability of the ADC, since signal conditioning is rather straight forward: it uses resistive dividers and filters.
n an automotive shop, asbestos is found in _________.
A) OilB) Brake liningsC) TiresD) Wiper fluid
Answers
Answer:
B.
Explanation:
I think it’s the brake linings.
This is because the asbestos is found inside of the brake linings.
Design a 3-bit binary counter using S-R flip flops.
Answers
Answer:
This is an asynchrnous 3-bit counter. Just note that this design is different and works differently than its synchronous counterpart. It's an easier design than its synchronous counterpart, and is not as reliable because it has delays.
Value Engineering is a creative, organized approach whose objective is to maximize cost and / or maximize performance of a facility or system.
True or False
Answers
True. Value Engineering is a creative, organized approach whose objective is to maximize cost and / or maximize performance of a facility or syste
Value Engineering is a systematic approach to improve the value of a product or system by analyzing its functions and reducing its costs while maintaining or improving its performance. The objective of value engineering is to maximize the value of a product or system by optimizing its cost and performance. It is a process that involves a team of professionals from various fields who work together to identify and eliminate unnecessary costs and improve the overall performance of the product or system. Value engineering is widely used in the construction industry to improve the value of buildings and other structures, but it can be applied to any product or system.
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