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REY [17]
3 years ago
9

Which best explains how thermal energy is transferred when someone holds a hand above a fire?

Physics
2 answers:
vodka [1.7K]3 years ago
8 0
It is being transferred by radiation because the hand is in the path of rising air
Artyom0805 [142]3 years ago
5 0
Heat rises therefore the heat from the fire rises up to your hand... i didnt have any answer choices to work with sorry
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A 75 kg astronaut floating in space throws a 5 kg rock at 5 m/sec. How fast does the astronaut move backwards?
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The astronaut will get a velocity 0.064ms−1 opposite to the direction of the object.

4 0
2 years ago
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solmaris [256]

Answer:

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Explanation:

8 0
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DanielleElmas [232]
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A small apple weighs 0.8N. How much would an apple that is 4 times as massive weigh?
-BARSIC- [3]

Answer:

W=31.99 N

Explanation:

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m*4= (0.816)4

= 3.264 kg

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4 0
3 years ago
How much time is needed to produce 720 Joules of work if 90 watts of power is used?
Tems11 [23]

Answer:

8 seconds

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power (P) is defined as the rate at which work is done.

power is measured in Watts (W) , when the work done is measured in Joules (J) and time in seconds

by the definition of power,

Power=\frac{work.done}{time.taken} \\ \\ time.taken=\frac{work.done}{power}\\=\frac{720J }{90W} \\ \\ =8 s

3 0
3 years ago
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