Question 351:

• JAMB 1985

A metal cube of volume 10³mm³ is lowered into a measuring cylinder containing water. If the internal cross-sectional area of the cylinder is 1.5 x 10²mm², by how much does the water level rise in the cylinder?

A. 6.67 x 10⁰mm
B. 8.50 x 10²mm
C. 1.15 x 10³mm
D. 2.50 x 10³mm
E. 1.50 x 10⁵mm

Question 352:

• JAMB 1985

A uniform cylindrical block of wood floats in water with one-third of its height above the water level, in a liquid of relative density 0.8, what fraction of its height will be above the liquid level?

A. \(\frac{1}{6}\)
B. \(\frac{1}{5}\)
C. \(\frac{1}{3}\)
D. \(\frac{4}{5}\)
E. \(\frac{5}{6}\)

Question 353:

• JAMB 1985

A thin aluminum plate has a surface area of 1500m^{[/sup] at 20[sup]o}C. What will be its surface area when it is cooled to -20^oC? (Take the linear expansivity of aluminum to be 2.5 x 10^-5k^-1).

A. 1.503m²
B. 1.500m²
C. 1.498m²
D. 1.497m²
E. 1.490m²

Question 354:

• JAMB 1985

Two liquids, P at a temperature of 20^oC and Q at a temperature of 80^oC have specific heat capacities of 1.0Jkg^-1oC^-1 and 1.5J kg^-1oC^-1respectively. if equal masses of P and Q are mixed in a lagged calorimeter, then the equilibrium temperature is

A. 44^oC
B. 50^oC
C. 56^oC
D. 60^oC
E. 70^oC

Question 355:

• JAMB 1985

A quantity of gas occupies a certain volume when the temperature is -73^oC and the pressure is 1.5 atmospheres. If the pressure is increased to 4.5 atmospheres and the volume is halved at the same time, what will be the new temperature of the gas?

A. 573^oC
B. 327^oC
C. 300^oC
D. 110^oC
E. 27^oC