Waec Physics 1999 Past Questions and Answers

Question 11:

• WAEC 1999

A pendulum bob executing simple harmonic motion has 2cm and 12Hz as amplitude and frequency respectively. Calculate the period of the motion.

A. 2.00s
B. 0.83s
C. 0.08s
D. 0.60s

Question 12:

• WAEC 1999

A trolley of mass 4kg moving on a smooth horizontal platform with a speed of 1.0ms^-1 collides perfectly with a stationary trolley of the same mass on the same platform. Calculate the total momentum of the two trolleys immediately after the collision.

A. 0.5Ns
B. 1.0Ns
C. 4.0Ns
D. 8.0Ns

Question 13:

• WAEC 1999

The ice point of an ungraduated mercury-in-glass thermometer is X, while its steam point is 90^o. This thermometer reads 60^o when the true temperature is 40^oC Calculate the value of X.

A. 60^o
B. 48^o
C. 40^o
D. 30^o

Question 14:

• WAEC 1999

Iron at 30^oC feels colder to the hand than wood at 28^oC because

A. Their linear expansivities are not equal.
B. The temperature of the iron is higher than that of the wood
C. Iron is a better radiator of heat than wood
D. Iron conducts heat more quickly from the hand than wood

Question 15:

• WAEC 1999

An iron rod of length 50m and at a temperature of 60^oC is heated to 70^oC. Calculate its new length. (Linear expansivity of iron = 1.2 x 10^-5K^-1)

A. 50.006m
B. 50.060m
C. 51.600m
D. 51.200m