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goldenfox [79]
3 years ago
8

Plz urgent give me about that question which are below

Physics
1 answer:
lubasha [3.4K]3 years ago
5 0

heat conduction is cut off by vacuum.

metal cover block light thereby protecting radiation

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weqwewe [10]

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C.

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2 years ago
You hang a 350 gram mass on a spring and its displaced 0.5 cm. Its spring constant is
Keith_Richards [23]

Answer:

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4 0
3 years ago
What is the formula for calculating the efficiency of a heat engine? Efficiency = StartFraction T Subscript h Baseline minus T S
Anna007 [38]

Efficiency of heat engine is determined by the ratio of difference in temperature of cold from hot reservoir to the temperature of hot reservoir over temperature of hot reservoir.

Answer: Option A

<u>Explanation:</u>

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Efficiency =\frac{T_{h} -T_{c} }{T_{h} }

Thus, option A is the most suitable as the heat will be transferred from high temperature to low temperature. So the hot reservoir will be releasing the energy. So the conversion of hot reservoir temperature to cool reservoir temperature is defined as the efficiency. Thus, option A is the most suitable.

9 0
3 years ago
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