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Andrews [41]
3 years ago
12

What is SI unit of energy?​

Physics
1 answer:
DIA [1.3K]3 years ago
4 0

Answer:

the SI unir of enery is joule

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Which protects a cell and forms it’s boundary
ivann1987 [24]

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For a plant cell: The cell wall and the cell membrane

For animal cells: Just the cell membrane

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Two light bulbs are installed in two sockets, the sockets are connected in series, and power is then applied to the combination
Arisa [49]

Answer:

False

Explanation:

<em>If one of the bulbs is removed from the series, the other bulb will not come on at all.</em>

This is because the removal of one of the bulbs would interrupt the flow of current though the entire circuit.

Hence, that the other one will get brighter if one of two bulbs in a circuit is removed from its socket is not true.

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3 years ago
Real bodies emit and absorb more radiation than a blackbody at the same temperature. True or False
monitta

Answer: False

Explanation:

Relative to the concept of radiations, a black body is an object capable of absorbing any form of electromagnetic radiation irrespective of its frequency or angle of incidence when incident on such object.

However, the same cannot be said about real bodies as real bodies are those which reflect all rays incident on them completely and uniformly in all directions.

One very important characteristic of black bodies is that they are ideal emmiters.

The concept of emmisivity is brought about by the existence of real bodies .

This is due to the fact that they are only able to emit radiation at a fraction of the black body energy levels.

Please note that by convention, the emmisivity of a real body is always less thaan 1.

As such they are not able to emit as much radiation as a black body at the same temperature.

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An engine is rated at 38% efficiency containing 415 J of energy in its heat reservoir. How much energy is in the
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Answer:

not sure sorry,

Explanation:

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