Recent questions in Engineering

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A well-insulated turbine operating at steady state develops 25 MW of power for a steam flow rate of 50 kg/s. The steam enters at 15 bar with a velocity of 61 m/s and exits as saturated vapor at 0.06 bar

Won Jun Bae asked Sep 27, 2020

by Won Jun Bae

6.1k points

1 answer

4 votes

142k views

The "view factor" Fij depends on surface emissivity and surface geometry. a) True b) False

Fuzes asked Sep 27, 2020

by Fuzes

6.2k points

1 answer

3 votes

93.9k views

For each of the cases below, determine if the heat engine satisfies the first law (energy equation) and if it violates the second law. 1. ˙QH=6 kW,˙QL=4 kW,˙W=2 kW 2. ˙QH=6 kW,˙QL=0 kW,˙W=6 kW 3. ˙QH=6

Badpanda asked Sep 27, 2020

by Badpanda

5.2k points

1 answer

4 votes

130k views

The human circulatory system consists of a complex branching pipe network ranging in diameter from the aorta (largest) to the capillaries (smallest). The average diameter and the number of these vessels

Geoff Swartz asked Sep 27, 2020

by Geoff Swartz

5.9k points

1 answer

5 votes

218k views

The equation for the velocity V in a pipe with diameter d and length L, under laminar condition is given by the equation V=Δpdsquare/32µL, with V=Δp the pressure drop and Δp the viscosity of the fluid.

Albert Hendriks asked Sep 27, 2020

by Albert Hendriks

5.4k points

1 answer

4 votes

235k views

REM rebound involves the A) tendency for REM sleep periods to become increasingly longer and more frequent as a normal night of sleep progresses. B) increase in REM sleep that characteristically follows

Atom Store asked Sep 27, 2020

by Atom Store

5.5k points

1 answer

2 votes

82.0k views

A computer maintenance company wants to 'capture' the knowledge that employees carry around in their heads by creating a database where employees document their solutions to unusual maintenance problems.

Erikzenker asked Sep 27, 2020

by Erikzenker

6.4k points

1 answer

0 votes

209k views

A civil engineer is analyzing the compressive strength of concrete. Compressive strength is approximately normally distributed with variance σ2 = 800 psi2. It is desired to estimate the compressive strength

Martin Verjans asked Sep 27, 2020

by Martin Verjans

6.1k points

1 answer

1 vote

184k views

You study flow over flat plate. Does flow over flat plate have any practical applications?

Ezequiel asked Sep 27, 2020

by Ezequiel

5.2k points

1 answer

5 votes

73.1k views

The average vehicle has ______ parts.

SchubySteve asked Sep 27, 2020

by SchubySteve

6.1k points

2 answers

2 votes

112k views

A combined-cycle power plant employs a gas-turbine system with a thermal efficiency of 38% and 200 MWt of combustion-produced heat. The gas-turbine discharge is directed into a heat recovery steam generator

Joostblack asked Sep 27, 2020

by Joostblack

6.6k points

1 answer

3 votes

203k views

How would you explain a car's wheel and axle system to a layperson?

AllSolutions asked Sep 27, 2020

by AllSolutions

5.6k points

2 answers

4 votes

200k views

What are the mechanisms of energy transfer in an open system?

DruidKuma asked Sep 26, 2020

by DruidKuma

5.7k points

1 answer

0 votes

13.8k views

Determine the change in the enthalpy of helium, in kJ/kg, as it undergoes a change of state from 100 kPa and 20 oC to 600 kPa and 300 oC

Zamil asked Sep 26, 2020

by Zamil

6.0k points

1 answer

4 votes

226k views

The exhaust steam from a power station turbine is condensed in a condenser operating at 0.0738 bar(abs). The surface of the heat transfer surface is held at 20°C. What percentage change does the inclusion

Guaycuru asked Sep 26, 2020

by Guaycuru

6.1k points

1 answer

2 votes

179k views

Two electronics technicians are discussing electronic components. Technician A says that electronic components are color-coded to indicate their electrical values. Technician B says that electronic components

Kevin Bradshaw asked Sep 26, 2020

by Kevin Bradshaw

5.5k points

1 answer

0 votes

119k views

What is the vorticity?

Miguelangel asked Sep 26, 2020

by Miguelangel

6.0k points

1 answer

3 votes

214k views

25 gallons of an incompressible liquid exert a force of 70 lbf at the earth’s surface. What force in lbf would 6 gallons of this liquid exert on the surface of the moon? The gravitational acceleration

Jhyap asked Sep 26, 2020

by Jhyap

5.6k points

1 answer

5 votes

182k views

Input Energy ---> Output Energy Which energy transfer best describes the following example? Windmill а Nuclear ------> Electrical Thermal -----> Motion motion ———> electrical

PQW asked Sep 26, 2020

by PQW

6.1k points

1 answer

5 votes

196k views

Which is a drawback of solar energy

Arnold Schrijver asked Sep 26, 2020

by Arnold Schrijver

5.7k points

1 answer

5 votes

16.8k views

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