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german
3 years ago
13

I have a doubt on heat and temperature. I need help with this science question and here the question: The water in a lake just r

eached freezing point temperature. Why can’t you go ice skating on it yet?
Physics
1 answer:
Volgvan3 years ago
5 0

Answer:

you can't go ice skating on it because if it just reached the temp then you need to wait for about 2 hours

Explanation:

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You are on a cruise ship traveling north at a speed of 13 m/s with respect to land. 1) if you walk north toward the front of the
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In order to find the our own velocity with respect to land,we need to apply the theory of relative velocity.


Now consider the velocity of the ship traveling towards the north with respect to land as A.Consider our own velocity headed northwards as B.

The relative velocity is the velocity that the body A would appear to an observer on the body B and vice versa.


In this case the relative velocity would be arrived by summing up our velocity with the velocity of the ship as the object (I) is travelling in the ship.


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Relative velocity = Velocity of Body A+ Velocity of Body B.


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Thus our own velocity with respect to the land is 15.8 m/s.



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3 years ago
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Answer:

Precisely, water has to absorb 4,184 Joules of heat (1 calorie) for the temperature of one kilogram of water to increase 1°C. For comparison sake, it only takes 385 Joules of heat to raise 1 kilogram of copper 1°C.

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