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saveliy_v [14]
3 years ago
5

Water cools from2oC to -2oC. During this time, what happens to the motion of the molecules? A) The motion of the molecules stops

. B) The motion of the molecules increases. C) The motion of the molecules decreases. D) The motion of the molecules remains the same.
Physics
1 answer:
tatuchka [14]3 years ago
5 0

Answer:

ITS D

Explanation:

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Answer:

Q = 5267J

Explanation:

Specific heat capacity of copper (S) = 0.377 J/g·°C.

Q = MSΔT

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Q = (508g) * (0.377 J/g·°C) * (27.5C)

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A block with a mass M = 4.85 kg is resting on a slide that has a curved surface. There is no friction. The speed of the block af
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Answer:

The correct option is a

Explanation:

From the question we are told that

   The mass of the block is  m =  4.84 \ kg

    The height of the vertical  drop is h =  19.6 \  m

Generally from the law of energy conservation , the potential energy at the top  of the slide is equal to the kinetic energy at the point after sliding this can be mathematically represented as

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i.e     m *  g  *   h   =  \frac{1}{2} *  m *  v^2

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=>    v = 19.6 \  m/s

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