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Matter In Our Surroundings
Give two examples of uniformly accelerated motions.
Examples of uniformly accelerated motions are:
(i) An object moving with uniform speed along a circular path, has uniform acceleration. In this case the velocity of the object changes continuously due to change in its direction at each point.
(ii) The motion of a ball rolling down an inclined plane is uniformly accelerated.
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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
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.
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