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Matter In Our Surroundings

Question
CBSEENSC9005700
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An electric train is moving with a velocity of 120 km/h. How much distance will it move in 30 s?

Solution
V e l o c i t y comma space v space equals space 120 space km divided by straight h Time space taken comma space straight t space equals space 30 space straight s space equals 30 over 3600 straight h space equals space 1 over 120 straight h Distance space space t r a v e l l e d space b y space t h e space t r a i n comma space straight s space equals space v straight t space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 120 space km divided by straight h space cross times space 1 over 120 straight h space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 1 space km. space

Some More Questions From Matter In Our Surroundings Chapter

Convert the following temperature to Celsius scale.

300K

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

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