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Ede4ka [16]
2 years ago
8

Explain melting and freezing using the kinetic theory of matter​

Physics
2 answers:
lapo4ka [179]2 years ago
7 0

QUESTION:

Explain melting and freezing using the kinetic theory of matter.

ANSWER:

As a liquid is cooled its molecules lose kinetic energy and their motion slows. When they’ve slowed to where intermolecular attractive forces exceed the collisional forces from random motion, then a phase transition from liquid to solid state takes place and the material freezes. These attractive forces can be any of several types:

  • Covalent.
  • Hydrogen (polar).
  • Ionic.
  • Van der Waals.
yulyashka [42]2 years ago
6 0

The temperature of solid which melts and turned into liquid when heat is applied is called melting.

The temperature of a liquid which becomes a solid at normal atmosphereic pressure is called freezing .

hope it is helpful to you ☺️☺️☺️

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Answer:

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Explanation:

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2 years ago
A train rolls past a stationary observer. To him, the train is moving at a speed of 23m/s west, and a woman on the train is movi
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Answer:

21.7 seconds.

Explanation:

Woman's velocity relative to train (23 m/s - 22.4 m/s) = 0.6 m/s

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To find how long she will take to move 13m relative to the train, take the distance she wants to travel divided by her velocity relative to the train.

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3 years ago
Unless indicated otherwise, assume the speed of sound in air to be v = 344 m/s. You have a stopped pipe of adjustable length clo
faltersainse [42]

Answer:

Length of pipe = 0.057 meter

Explanation:

Speed of a transverse wave on a string

v = \sqrt{\frac{F}{\mu} }

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\mu = \frac{m}{L}

Substituting the given values we get -

\mu = \frac{7.25 * 10^{-3}}{0.62}\\mu = 0.0117 \frac{Kg}{m}

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v = \sqrt{\frac{4510}{0.0117} } \\v = 620.86 \frac{m}{s}

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Substituting the given values, we get -

f = \frac{3 * 620.86}{2 * 0.62} \\f = 1502.08

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L = \frac{nv}{4 f}

Substituting the given values we get

n = 1 for first harmonic wave

L = \frac{344* 1}{4*1502.08} \\L = 0.057

Length of pipe = 0.057 meter

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Answer:

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