3 years ago

What is meant by the term friction

Physics

2 answers:

Minchanka [31]3 years ago

8 0

It can mean the resistance that one surface or object encounters when moving over another.

Naddika [18.5K]3 years ago

8 0

the resistance that one surface or object encounters when moving over another.

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A system undergoing a power cycle develops a steady power output of 0.3 kW while receiving energy input by heat transfer at a ra

uranmaximum [27]

Answer:

The thermal efficiency is 43%.

The total amount of energy developed by work is 397 kW in one year.

Explanation:

Given that,

Power output = 0.3 kW

Heat energy = 2400 Btu/h = 0.703 kW

We need to calculate the thermal efficiency

Using formula of efficiency

$\eta=\dfrac{out-put}{in-put}$

Put the value into the formula

$\eta=\dfrac{0.3}{0.703}$

$\eta=0.43\times100$

$\eta=43\%$

The thermal efficiency is 43%.

(b). We need to calculate the total amount of energy

Using formula of energy

$E=0.43\times0.703\times60\times60\times365$

$E=397209.06\ J$

$E=397\ kW$

Hence, The thermal efficiency is 43%.

The total amount of energy developed by work is 397 kW in one year.

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If 36 columb of charge pass through a wire in 45 what current is it carrying ?

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Current I is the rate at which charge moves through an area A, such as the cross-section of a wire

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The answer is Zip.

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Which has more momentum, a small object moving 10 miles per hours or a large object at rest?

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Well the object will have no Momentum since it is not moving, so a small object that is going 10 mph will have Momentum.

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assuming that voltage remains constant, what happpens to the current in a wire as its diameter decreases?

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