Answers

A spiral spring with a metal extends by 10.5 cm in air. When the metal is fully submerged…

A stone projected horizontally from the top of a tower with a speed of 4 ms(^{-1}) lands on…

(a) Explain diffusion. (b) Give one reason why the rate of diffusion is higher in gases than in…

(a) Define magnetic line of force. (b) A wire of length 10 cm carrying a current of 4.0…

 (a) (i) Explain why x-rays can be used to produce photographs of fractures in bones. (ii) List four…

(a) (i) What is a machine? (ii) State two uses of gears. (iii) Define the velocity ratio for…

(a) Explain the term critical angle. (b) List two factors which determine the deviation of a ray of…

 (a) Explain wave-particle duality of light. (b) Illustrate your answer in (a) with observable phenomena. Explanation (a) Wave…

(a) State the principle of conservation of linear momentum. (b) Explain the mode of action of a propelled…

 (a) On what principle does lighting in a fluorescent tube operate? (b) State two factors which determine the…