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Matter In Our Surroundings
What can you say about the motion of a body, if its velocity-time graph is a straight line?
Here two possibilities exist:
(i) The body has a uniform velocity, if the velocity-time graph is a straight line parallel to the time-axis.
(ii) If the velocity-time graph is inclined to the time-axis at certain angle, the body has uniform acceleration.
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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
What is the physical state of water at
100°C
Give two reasons to justify
Water at room temperature is a liquid.
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