Derive the relation `vec(j)=sigmavec(E)` with terms which has usual meaning.

(a) What is the relation between loudness and frequency ? (b) What is the unit of intensity of sound ? (c) Derive the relation v = v lamda where the letters have their usual meanings.

Derive the relation F=ma , where the symbols have their usual meanings. What is one newton?

Using time velocity graph,derive the relation v^2-u^2 = 2aS ,where every letter has its usual meaning.

Discuss the phenomenon of refraction of light through a glass prism. Derive the relation: A+delta=i+e ,where the symbols have their usual meninges.

Derive the relation F=ma , where the symbols have their usual meanings.

Using expressisions for power and kinetic energy of rotational motion, derive the relation tau = I alpha , where letters have their usual meaning.

Derive graphically the relation v=u+at ,where the symbols have their usual meaning.

State the law of radioactive decay and hence derive the relation N=N_0e^(-lambdat) , where the letters have their usual meanings?