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Matter In Our Surroundings

Question
CBSEENSC9006372
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What kind of energy transformation takes place when a body is dropped from a certain height. Explain.

Solution

When a body is dropped from a certain height, its potential energy gradually changes into kinetic energy. On reaching the ground, the whole of its potential energy gets converted into kinetic energy. But when the ball strikes the ground, the kinetic energy is converted into sound, light and heat. 

Some More Questions From Matter In Our Surroundings Chapter

Convert the following temperatures to Kelvin scale

25°C

What is the physical state of water at

100 °C

For any substance, why does the temperature remain constant during the change of state ?

Suggest a method to liquify atmospheric gases.

Convert the following temperatures to Kelvin scale.

35°C

Give reason for the following observations.

Naphthalene balls disappear with time without leaving any solid.

Give reason for the following observations.

We can get the smell of perfume sitting several metres away.

What is the physical state of water at

a) 25°C
b)00C
c)1000C

What is the physical state of water at
0°C

What is the physical state of water at
100°C

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