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Matter In Our Surroundings

Question

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The velocity of a car is 18 m/s. Express the velocity in km/h.

Solution

Given, velocity of car = 18 m/s

Now, the velocity of the car in km/hr is given by,

v = \frac{18}{1000} \times 3600 = 64.8 km / hr

Some More Questions From Matter In Our Surroundings Chapter

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

Give two reasons to justify
Water at room temperature is a liquid.

Give two reasons to justify
An iron almirah is a solid at room temperature.

Why is ice at 273K more effective in cooling than water at the same temperature ?

What produces more severe burns, boiling water or steam ?

8. Name A, B, C, D, E and F in the following diagram showing state change :

Both boiling and evaporation convert a liquid into vapour. What is the difference between the two process

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