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Matter In Our Surroundings
Which of the following is true for displacement?
(a) It can not be zero.
(b) Its magnitude is greater than the distance travelled by the object.
a) Statement is false. Displacement can be zero. If a body starts from a point and then comes back to the same point through the same path, displacement is zero.
b) The magnitude of the displacement is always less than or equal to the distance travelled by the object.
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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
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 ?
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