Waec Physics 2000 Past Questions and Answers

Question 56:

• WAEC 2000

a) Define the term surface tension
(b) Calculate the force required to lift a needle 4cm long off the surface of water if the surface tension of water is 7.3 x 10\(^{-4}\) NM\(^{-1}\)

Question 57:

• WAEC 2000

State any three properties of matter which are common to all substances.

Question 58:

• WAEC 2000

Define (i) Elasticity; (ii) Young's modulus; (iii) Force constant.

Question 59:

• WAEC 2000

A force of 40 N is applied at the end of a wire 4m long and produces an extension of 0.24mm. If the diameter of the wire is 2.00mm, calculate the;
(i) stress on the wire; (ii) strain in the wire.

Question 60:

• WAEC 2000

(a) Differentiate between interference and polarisation as applied to waves.
(b) Mention two uses of polaroids