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marshall27 [118]
3 years ago
6

A student placed 700g of water at 28° c in the freezer.after 6 minutes and 15 seconds the water was transformed to ice.

Physics
1 answer:
Maru [420]3 years ago
7 0

Answer:

is this the full questions

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The sound waves from a noisy jet travel from the air into water. Which property of the wave will not change?​
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The frequency of the wave will not change. Since the change in medium doesn't affect the source of the waves, the frequency of those waves do not change.

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5. How much heat is generated when an
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Answer:

I HOPE THIS IS CORRECT

Explanation:

Power of water =2 kw=2000w

Mass of water =200kg

difference in temperature ΔT=70−10=60oC

Concept

energy required to heat the water = energy given by water in time t=pt

energy required to increase tempeature of water by 60oC,Q=msΔT

S= specific heat =4200J/kgoC

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or   t=25.2×103sec.

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How much work is done when an engine generates 400 Watts of power in 25 seconds?
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400 = workdone/25

workdone = 400 * 25

=10000 J

8 0
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