Question

Please heat form of energy answer please

Answer 1

1) Heat is the factor which causes expansion in matter.
2) When we heat a substance, its length, area and volume increase. The expansion is caused when the substance absorbed the heat energy and hence tends to expand. On heating any substance, according to the kinetic theory of matter, the average kinetic energy of molecules increases to overcome the attractive forces.
3) The expansion in which the change in volume of a solid substance is observed on heating is called cubical expansion of solid.
4) The linear expansion of a wire / rod depends on the following factors :
(i) Original length of the wire/rod
(ii) Increase in temperature
(iii) Material of the wire/rod.




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