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Matter In Our Surroundings

Question
CBSEENSC9005801
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Ravi told his friend that his house is 1 km towards south from the Main Post Office. Express displacement and the distance moved by the friend from the Post Office when he arrives at Ravi’s house. Mention the reference point chosen.

Solution

We have considered Post Office as the reference point or origin.

(i) Distance moved by the friend in going from Post Office to Ravi’s house = 1 km.

(ii) Displacement moved by the friend in going from Post Office to Ravi’s house = 1 km, due south.

Some More Questions From Matter In Our Surroundings Chapter

Convert the following temperature to Celsius scale.

573 K

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

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