Physics Past Questions and Answers

Explain the rise of water in a glass capillary tube using the kinetic theory.

(a) What is diffusion?
(b) State two factors which affect the rate of diffusion.

(a) Explain elasticity of a substance.
(b) Define elastic constant.

A wire is gradually stretched until it snaps. Sketch a load-extension graph for the wire and on the graph indicate the
(a) elastic limit;
(b) yield point;
(c) maximum load;
(d) breaking point.

(a) Define horizontal range of a projectile.
(b) The horizontal range, R, of a projectile is given by the equation R = \(\frac{u^2 sin 2\theta}{g}\)
(i) what does \(\theta\) in the equation represent?
(ii) for what value of \(\theta\) would R be maximum?