Waec Physics 2004 Past Questions and Answers

Question 21:

• WAEC 2004

When compared with water, mercury is preferred as a thermometric liquid because

A. Has a higher density
B. Has lower specific heat capacity
C. Exhibits anomalous thermal expansion
D. Contains molecules which have very strong adhesive forces

Question 22:

• WAEC 2004

Which of the following values on the absolute scale of temperature is the ice point?

A. 0K
B. 32K
C. 100K
D. 273k

Question 23:

• WAEC 2004

On a cold day, a concrete floor feels colder to the bear foot then a mat on the same floor because the

A. Is better conductor of heat than the foot
B. Mat loses heat to the bare foot at a faster rate
C. Mat is better conductor of heat than the floor
D. Concrete floor is a better conductor of heat than the mat

Question 24:

• WAEC 2004

When a metal ball is heated through 30^oC,its volume becomes 1.0018cm³. If the linear expansivity of the material of the ball is 2.0 x 10^-5 K^-1, calculate its original volume

A. 1.0000cm³
B. 1.0020cm³
C. 1.0036cm³
D. 1.0180cm³

Question 25:

• WAEC 2004

A faulty barometer reads 72.6cm Hg when the atmospheric pressure is 75.0cm Hg. Calculate the atmospheric pressure when the barometer reads 72.0cn Hg

A. 79.4cm Hg
B. 74.38cm Hg
C. 74.2cm Hg
D. 69.4cm Hg