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Name two substances which contract on heating.
State the volume changes that you will observe when a given mass of water is heated from 0°C to 10°C. Sketch a temperature-volume graph to show the behaviour.
Define heat energy on the basis of kinetic theory of matter.
Name the substance which contracts when heated from 00C to 40C.
Give a scientific reason for the following:
On a hot sunny day, it is advisable to wear light coloured clothes.
Define the process of conduction.
The following figure shows a rectangular box with two tubes P and Q at the top. A burning candle R is placed under the tube P. The candle burns brightly.
Explain:
(i) How is the air in the box circulating?
(ii) What will happen if the opening Q is closed?
If you keep ice at 0° C and water at 0° C in either of your hands, in which hand you will feel more chillness? Why?
______ determines the direction of the flow of heat.
Assertion: Temperature is the measure of heat energy.
Reason: Energy is the capacity to do work.
