Waec Physics 2000 Past Questions and Answers

Question 16:

• WAEC 2000

A machine of efficiency 8% is used to raise a body of mass 75kg through a vertical height of 3m in 30s. Calculate the power input. (g = 10ms^-2)

A. 9.4W
B. 60.0W
C. 75.0W
D. 93.8W

Question 17:

• WAEC 2000

Two bodies P and Q, are in thermal equilibrium, which of the following statements about the bodies is correct?

A. The temperature of Q is higher than that of P
B. P and Q have the same heat capacty
C. P and Q have the same mass
D. P and Q are at the same temperature

Question 18:

• WAEC 2000

The cubic expansivity of mercury is 1.8 x 10^-4K^-1 and the linear expansivity of glass 8.0 x 10^-6K^-1, calculate the apparent expansivity of mercury in a glass container

A. 1.00 x 10^-4K^-1
B. 1.56 x 10^-4K^-1
C. 1.72 x 10^-4K^-1
D. 2.04 x 10^-4K^-1

Question 19:

• WAEC 2000

The diagram shows the variation of volume V of a glass with temperature at the point X is

A. -32^oC
B. -100^oC
C. -273^oC
D. -373^oC

Question 20:

• WAEC 2000

The volume and pressure of a given mass of gas at 27^oC are 76cm³ and 80cm of mercury respectively. Calculate the volume at s.t.p

A. 36.2cm³
B. 72.8cm³
C. 100.0cm³
D. 808.9cm³