Recent questions in Engineering

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A reversible heat pump and a Carnot heat pump operate between the same two thermal reservoirs. Which heat pump has higher COP?

Lmasneri asked May 21, 2020

by Lmasneri

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5 votes

138k views

Dimensional analysis: a)-Can be used to derive equations and non-dimensional numbers. b)-Helps in planning experiments. c)-Is an efficient way of storing and retrieving experimental data. d)-Is very helpful

Elelias asked May 21, 2020

by Elelias

4.8k points

1 answer

1 vote

15.9k views

9. Which of the following statements about drum brake shoes is not true? a. Web thickness varies only with changes in shoe size. b. Many shoes have indented places along the edge of the rim. c. The shoe

Zkent asked May 21, 2020

by Zkent

4.5k points

1 answer

3 votes

17.3k views

A 5cm OD and 0.5cm thick copper pipe [k=386W/m.°C] has hot gas flowing inside at a temperature of 200°C with a heat transfer coefficient of 30W/m2.°C. The outer surface dissipates heat by convection into

Dally asked May 21, 2020

by Dally

5.3k points

1 answer

0 votes

159k views

A 30-seat turboprop airliner whose mass is 14,000 kg takes off from an airport and eventually achieves its cruising speed of 620 km/h at an altitude of 10,000 m. For g = 9.78 m/s^2, determine the change

Savad asked May 21, 2020

by Savad

5.9k points

1 answer

4 votes

19.4k views

10% A steel beam W18x76 spans 32 feet and is subjected to a Moment of 334 kips-ft. Find the load w on the beam. Determine the deflection at 14 span and mid span. What is the shear stress?

John Stewart asked May 21, 2020

by John Stewart

4.6k points

1 answer

0 votes

197k views

Compact fluorescent bulbs are much more efficient at producing light than are ordinary incandescent bulbs. They initially cost much more, but they last far longer and use much less electricity. According

Vishal Khialani asked May 21, 2020

by Vishal Khialani

4.4k points

1 answer

3 votes

50.6k views

Charge e is uniformly spread on the surface of a sphere of radius 10^-10m. What is the total electrostatic energy of the system?

Nimbous asked May 21, 2020

by Nimbous

5.1k points

1 answer

3 votes

193k views

Define reverberation

VBAbyMBA asked May 21, 2020

by VBAbyMBA

5.5k points

1 answer

0 votes

153k views

Describe the slip mechanism that enables a metal to be plastically deformed without fracture.

MrCujo asked May 20, 2020

by MrCujo

4.3k points

1 answer

3 votes

1.8k views

5. Name two health problems that fume can cause? a).... b)......

Crashwap asked May 20, 2020

by Crashwap

4.8k points

2 answers

0 votes

55.1k views

An automobile weighing 2500 lbf increases its gravitational potential energy by a magnitude of 2.25 × 104 Btu in going from an elevation of 5183 ft in Denver to the highest elevation on Trail Ridge Road

Simonrichardson asked May 20, 2020

by Simonrichardson

4.6k points

1 answer

4 votes

129k views

A mass of 2 kg is hanging to a spring of 200 n/m spring constant vertically. Calculate the period of the period if the spring is set in simple harmonic motion.

Verec asked May 20, 2020

by Verec

5.0k points

1 answer

1 vote

73.1k views

Use matlab to plot the function T=6lnt-7e^(0.2t) over the interval 1 < t < 3 ( 1 than 3). put a title on the plot and properly label the axes. The variable T represents temperature in degrees Celsius; the variable t represents time in minutes.

Bejond asked May 20, 2020

by Bejond

4.8k points

1 answer

3 votes

162k views

What are the benefits of an inverter power supply?

Shuki asked May 20, 2020

by Shuki

4.6k points

1 answer

3 votes

200k views

A closed rigid tank contains water initially at 10,000 kPa and 520ºC and is cooled to a final temperature of 270° C. Determine the final pressure of the water.

Bitscanbyte asked May 20, 2020

by Bitscanbyte

4.6k points

1 answer

3 votes

47.6k views

A tank contains 500 kg of a liquid whose specific gravity is 2. Determine the volume of the liquid in the tank.

LordAnomander asked May 19, 2020

by LordAnomander

5.1k points

1 answer

2 votes

234k views

A semiconductor is a solid substance that has a conductivity between that of an insulator and that of most metals. (True , False )

Tumbudu asked May 19, 2020

by Tumbudu

4.7k points

1 answer

1 vote

54.5k views

If 1 uF capacitor is fully charged with 120 V across it, how much energy is stored in it? (a) 7.2 kJ (b) 7.2 mJ (c) 0.12 mJ (d) 0.12 kJ

Kevin Moe Myint Myat asked May 19, 2020

by Kevin Moe Myint Myat

4.8k points

1 answer

2 votes

27.8k views

A Carnot engine whose low-temperature reservoir is at 19.1°C has an efficiency of 30.7%. By how much should the Celsius temperature of the high-temperature reservoir be increased to increase the efficiency

JEROM JOY asked May 19, 2020

by JEROM JOY

5.0k points

1 answer

1 vote

155k views

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