Motion — PHYSICS STD 7 — Question

How many millilitres are contained in (i)1 m,sup>3 (ii) 1 litre ?

Define time period and its SI unit.

Name the type of energy (kinetic or potential) possessed by the following:
A stone at rest on the top of a building.

What do you mean by a vibratory motion ?

What do you understand by oscillatory motion ?

Why does a piece of paper appear white in sunlight ? How would you expect it to appear when viewed in red light?

All stored energy is potential energy. Do you agree?

A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is just in the middle .

Explain the meaning of the terms rest and motion.

Select conductors and insulators from the following :
Glass, silver, copper, wood, paper, pure water, impure water, aluminium, iron, leather, plastic, steel, human body and ebonite.