There is always an uncertainty involved in any attempt to measure the position and momentum of an electron simultaneously. This statement is known as the

The diagram above illustrates three forces acting on an object at point O. If the object is in equilibrium, determine the magnitude of the force P.

Calculate the effective resistance between P and Q in the diagram above

 A particle is projected at an angle of 30° to the horizontal with a speed of 250 ms\(^{-1}\). Calculate the;

(a) total time of flight of the particle;

(b) speed of the particle at its maximum height. [ g = 10 ms\(^{-2}\)]

State;

(a) the difference between plane polarized light and ordinary light;

(b) two uses of polaroids.