Sound — Physics STD 10 — Question

When light travels from a rarer to a denser medium, its speed________ .

Complete the following sentence:

A pressure cooker is based on the principle that boiling point of water increases with the _________

The S.I. unit of moment of force is _________.

Kilowatt is the unit of ________ and kWh is the unit of.

A class ___________ [I/II/III] lever always acts as a force multiplier.

The conversion of part of energy into an undesirable form is called ________ .

The rate of doing work is called ___________ [energy/ capacity / power).

Complete the following sentence :

water can be made to boil at 115°C by ................. pressure over its surface.

When a body moves in a circular path, outward force is called a ______________ [Centrifugal force/Centripetal force/Reaction force].

The direct change from solid to vapour is called ___________ [sublimation / solidification] and the reverse change from vapour to solid is called ___________ [sublimation / solidification].