Light Energy — PHYSICS STD 7 — Question

_________ determines the degree of hotness or coldness of a body.

The work done by a body is the product of force and ___________ .

The bouncing off of sound energy, on striking a hard surface, into the same medium is called ___________ of sound.

Mercury is the only liquid which gets heated up due to the process of ___________ .

On heating a body, its temperature _______.

An electromagnet is a ____________ magnet.

We use a ________ for measuring the temperature of a body.

The phenomenon due to which the left side of an object, appears as the right side of image during reflection of light is called ___________ .

Regular reflection results in the formation of __________ images.

Solids ___________ on heating.