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Naya [18.7K]
3 years ago
6

Work-producing devices that operate on reversible processes deliver the most work, and work-consuming devices that operate on re

versible processes consume the least work. a)- True b)- False
Engineering
1 answer:
Margarita [4]3 years ago
4 0

Answer: True

Explanation:

Yes, it is true that work producing device that can operate on reversible process deliver the most work as, the process must be quasi equilibrium to be reversible and work consuming device that operate on reversible process consume the least work as, energy released by the reversible process can do maximum amount of work as, less energy lost as heat and energy loss is very less in reversible energy and less work require to operate as consuming device.

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Which is a better hydraulic cross section for an open channel: one with a small or a large hydraulic radius?
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Hydraulic radius is caused by pressurized hydrogen air so that should mean the answer is hydraulic radius
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3 years ago
Let S = { p q |p, q are prime numbers greater than 0} and E = {0, −2, 2, −4, 4, −6, 6, · · · } be the set of even integers. . Pr
Finger [1]

Answer:

prove that | S | = | E | ; every element of S there is an Image on E , while not every element on E has an image on S

Explanation:

Given that S = { p q |p, q are prime numbers greater than 0}

                    E = {0, −2, 2, −4, 4, −6, 6, · · · }

To prove  by constructing a bijection from S to E

detailed  solution attached below

After the bijection :

<em>prove that | S | = | E |</em> :  every element of S there is an Image on E , while not every element on E has an image on S

∴ we can say sets E and S are infinite sets

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3 years ago
A 3-in-thick slab is 10 in wide and 15 ft long. The thickness of the slab is reduced by 20% and width increases by 3% in a hot-r
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Answer: l = 2142.8575 ft

v = 193.99 ft/min.

Explanation:

Given data:

Thickness of the slab = 3in

Length of the slab = 15ft

Width of the slab = 10in

Speed of the slab = 40ft/min

Solution:

a. After three phase

three phase = (0.2)(0.2)(0.2)(3.0)

= 0.024in.

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= 10.927 in.

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= (3.0)(10.0)(15 x 15) = (0.024)(10.927)Lf

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= 6750 /0.2625

= 25714.28in = 2142.8575 ft

b.

vf = (0.2 x 0.2 x 3.0)(1.03 x 1.03 x 10.0)(40)/(0.024)(10.927)

= (0.12)(424.36)/0.2625

= 50.9232/0.2625

= 193.99 ft/min.

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3 years ago
Consider a continuous-flow, indraft supersonic wind tunnel, which uses a vacuum pump to draw atmospheric air from outside of the
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