(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?

 Explain the action of direct electric current in an electrolytic process with a dilute solution of sodium chloride as electrolyte