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4 years ago

Can a heat engine operating with only one thermal reservoir?

Engineering

1 answer:

Harlamova29_29 [7]4 years ago

5 0

Answer:

Explanation:

Heat engine is a device which operates between two thermal reservoir.One thermal reservoir supply the thermal energy to the heat engine and another thermal reservoir absorb heat rejected by heat engine.These thermal reservoir are infinite amount of heat capacity system.Temperature of thermal reservoir remain constant always.

So we can say that heat engine can not operate by using only one thermal reservoir.

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Which type of voltage do generators produce?

Alecsey [184]

Answer:

How does electricity produce magnetism?

Explanation:

When the electricity is switched on, the electric magnets create powerful magnetic fields. Coils of wire are mounted around the shaft. As the shaft with the magnets rotates, the coils of wire are exposed to changing magnetic fields, and an electric current is generated in the wires.

5 0

3 years ago

Read 2 more answers

A pendulum has an oscillation frequency (T) which is assumed to depend upon its length (L), load mass (m) and the acceleration o

Natalka [10]

Answer:

Mass does not affect oscillation frequency.

Explanation:

Let the bob of the pendulum makes a small angular displacement θ. When the pendulum is displaced from the equilibrium position, a restoring force tries to act upon it and it tries to bring the pendulum back to its equilibrium position. Let this restoring force be F.

Therefore, F = -mgsinθ

Now for pendulum, for small angle of θ,

sinθ $\simeq$ θ

Therefore, F = -mgθ

Now from Newton's 2nd law of motion,

F = m.a = -mgθ

$\Rightarrow m.\frac{d^{2}x}{dt^{2}} = - mg\Theta$

Now since, x = θ.L

$\Rightarrow L.\frac{d^{2}\Theta }{dt^{2}}= -g\Theta$

$\Rightarrow \frac{d^{2}\Theta }{dt^{2}}= -\frac{g}{L}.\Theta$

$\Rightarrow \frac{d^{2}\Theta }{dt^{2}}+\frac{g}{L}.\Theta =0$

Therefore, angular frequency

$\omega ^{2}$ = $\frac{g}{L}$

ω = $\sqrt{\frac{g}{L}}$

Also we know angular frequency is , ω = 2.π.f

where f is frequency

Therefore

2πf = $\sqrt{\frac{g}{L}}$

f = $\frac{1}{2 \pi }\sqrt{\frac{g}{L}}$

So from here we can see that frequency,f is independent of mass, hence it does not affect frequency.

5 0

3 years ago

B) Calculate the FS against uplift and calculate effoctive stress at the base level for water

Vinvika [58]

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8 0

3 years ago

Dimensional analysis: a)-Can be used to derive equations and non-dimensional numbers. b)-Helps in planning experiments. c)-Is an

iris [78.8K]

Answer:

Option e)

Explanation:

Dimensional Analysis helps in the analysis of relationship between physical quantities, checking its dimension thus checking the accuracy of a given or to find the dimensions of a quantity or the degree of correctness of an equation.

Dimensional analysis has some of the applications that are listed below:

To establish a relationship between physical quantities
To check the accuracy of a given formula
To derive units of a physical quantity
To convert system of units in one another.

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3 years ago

The moisture content in air (humidity) is measured by weight and expressed in pounds or ____________________.

VikaD [51]

Moisture content is measured in terms of pounds of water per pound of air (lb water/lb air) or grains of water per pound of air (gr. of water/lb air).

Hope this helps❤

3 0

3 years ago