Sound — PHYSICS STD 7 — Question

The weight of a body can be___________ but not the mass.

A needle of a sewing machine describes ___________ motion.

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

________ produces a sensation in ears.

The angle which an incident ray makes with___________ is called angle of incidence.

For a given substance, the boiling point of its liquid state and the ___________ point of its gaseous state are same.

Liquids do not have a _________ shape.

The ___________ of a body is defined as the quantity of matter contained in it.

The density of ___________ hardly changes with a rise in temperature by 20 degree celcius.

The weight of a body is measured using a _____________.