Heat — PHYSICS STD 7 — Question

Distance travelled d = ________ × time t

The speed of light is around ____________ in vacuum.

Green plants convert _________ energy into chemical energy.

The object on which work is done,___________ energy.

The process due to which a gas changes into liquid state at fixed temperature is called ___________ .

__________ is the ratio of the total distance travelled to the total time taken.

When a solid directly changes to gaseous state on heating, without changing to the liquid state, the gaseous material so formed is called ___________ .

The SI unit of area if___________ .

The expansion produced in matter due to the absorption of heat is known as ___________ expansion.

__________ energy is produced when you strike a drum.