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Matter In Our Surroundings
The positions of a ball rolling down an inclined plane at the end of each second are given in the following table:
Plot a displacement-time graph for the motion of the ball. Indicate whether the motion is uniform or non-uniform.
The displacement-time graph for the motion of the ball is as shown in Fig. below.
Fig. 8.25. Displacement-time graph for non-uniform motion.
The displacement-time graph is a curve, so motion of the ball is non-uniform.
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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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