State three properties of lasers that make them preferable to ordinary light beam.

In a solar panel for heat supply, state the function of each of the following parts: (a) metal flat plate; (b) thermal insulator: (c) tubes.

A satellite launched with velocity V\(_E\) just escapes the earth's gravitational attraction. Given that the radius of the earth is R, show that V\(_E\) = \(...

(a) In the design of an optical fibre, what type of material is most suitable for the design of the core? (b) State one condition necessary to confine signal...

The velocity v, of a wave in a stretched string, depends on the tension T, in the spring and the mass per unit length of the spring. Obtain an expression for...

A bullet is fired from a gun at 30\(^o\) to the horizontal. The bullet remains in flight for 25s before touching the ground. Calculating the velocity of proj...

(a)i) Define a torque. (ii)State three factors that determine a torque (b)(i) Define free fall. (ii) A body is thrown vertically upwards from the top of a to...

An elastic material of length 3m is to be stretched to reduce an extension three times its original length. Calculate the force required to produce the exten...

(a)Explain resonance frequency as applied in RLC series Circuit. (ii) Sketch a diagram to illustrate the variation of frequency, f, with the resistance, R, t...