a. Define strain energy. b. Write an expression for the energy stored, E, in a stretched wire of original length, l , cross-sectional area, A, extension, e,...

a. A projectile is fired at an angle, θ, to the horizontal with velocity, u. Show that at any time, t, during the motion, the: i. horizontal component of the...

a. What is fibre optics? b. State two reasons why optical fibres are preferred to copper cables in the telecommunication industry.

a. State one difference between an intrinsic and an extrinsic semiconductor. b. Draw a circuit diagram to illustrate full wave smoothing rectification.

The force, F, acting on the wings of an aircraft moving through the air of velocity, v, and density, ρ, is given by the equation F = \(kv^xρ^yA^z\), where k ...

a. Define each of the following terms used with simple machines: i. Pivot ii.Load iii. Efficiency. b. A truck of mass 1.2 × \(10^3\) kg is pulled from rest b...

ai. State the reason why simple harmonic motion is periodic. ii. State two factors that affect the period of oscillation of a simple pendulum. iii. Sketch a ...

a. Using the kinetic theory, explain the term diffusion of fluid molecules. b. Name one phenomenon that demonstrates that light behaves as a: i. wave ii. par...

State three differences between geostationary satellites and polar satellites.