Mention the uses of a distance-time graph.
Distance-time graph can be useful in the following ways:
(i) It tells the position of the body at any instant of time.
(ii) The distance covered by the body during a particular interval of time can be seen from the graph.
(iii) The velocity of the body at any instant of time can be determined.
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
Mock Test Series
