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3 years ago

Which units are used to express kinetic energy

Physics

2 answers:

Kay [80]3 years ago

4 0

Oh ! You just said "energy". So it's going to be measured in Joules.

nevsk [136]3 years ago

3 0

kinetic energy is usually measured in joule J which is equals to kgm²/s²

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3 years ago

(d) If η = 40% and TH = 427°C, what is TC, in °C?

Brrunno [24]

Answer:

$T_C=256.2^{\circ}C$

Explanation:

Given that,

Efficiency of heat engine, $\eta=40\%=0.4$

Temperature of hot source, $T_H=427^{\circ}C$

We need to find the temperature of cold sink i.e. $T_C$ . The efficiency of heat engine is given by :

$\eta=1-\dfrac{T_C}{T_H}$

$T_C=(1-\eta)T_H$

$T_C=(1-0.4)\times 427$

$T_C=256.2^{\circ}C$

So, the temperature of the cold sink is 256.2°C. Hence, this is the required solution.

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3 years ago

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Mashcka [7]

Answer:

i think the answer is D

Explanation:

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3 years ago

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snow_tiger [21]

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3 years ago

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Answer:

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Explanation:

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3 years ago