(a) State two conditions under which photo-electrons can be emitted from the surface of a metal. (b) List two particle characteristics of electromagnetic wa...

A metallic bar 50 cm long has a uniform cross-sectional area of 4.0 cm\(^2\). If a tensile force of 35 kN produces an extension of 0.25 mm, calculate the val...

(a) Give two examples each of: (i) rotational motion; (ii) linear motion. (b) Describe a laboratory experiment to determine the density of an irregularly sha...

(a) Explain how a gas can be made to conduct electricity. (b) Name the electric charge carriers in gases.

The diagram above represents the graph of electron energy against the frequency of the radiation incident on a metal surface. Interpret the: (a) slope of the...

An electron moves with a speed of 2.00 x 10\(^7\) ms\(^{-1}\) in an orbit in a uniform magnetic field of 1.20 x 10\(^{-3}\) T. Calculate the radius of the or...

a) Define heat capacity and state its unit. (b) List two effects of heat on a substance. (c) Explain how a tightly fitted glass stopper could be removed from...

A tennis ball projected at an angle 0 attains a range R = 78. If the velocity imparted to the ball by the racket is 30 ms\(^{-1}\), calculate O. [ g = 10 ms\...

A particle is projected horizontally at 10 ms\(^{-2}\) from the top of a tower 20 M high. Calculate the horizontal distance travelled by the particle when it...