Pressure - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1979

The density 400cm³ of palm oil was 0.9gcm^-3 before frying. If the density of the oil was 0.6gm^-3 after frying,assuming no loss of oil due to spilling, its new volume was

A. 360cm³
B. 600cm³
C. 240cm³
D. 800cm³
E. 450cm³

Question 7:

• JAMB 1979

An air bubble rises from the bottom to the top of a water dam which is 40m deep. The volume of the bubble just below the surface is 2.5cm³. Find its volume at the bottom of the dam, if atmospheric pressure is equivalent to 10m water

A. 0.0cm³
B. 2.0cm³
C. 1.6cm³
D. 0.625cm³
E. 0.5cm³

Question 8:

• JAMB 1979

An air column 10cm in length is trapped into the sea end of a capillary tube by a 15cm column of mercury with the tube held vertically as shown above. On inverting the tube the air column becomes 15cm long. The atmospheric pressure during the experiment is

A. 90cm
B. 76cm
C. 75cm
D. 60cm
E. 50cm

Question 9:

• JAMB 1980

a pressure cooker saves both time and fuel in cooking because inside the cooker, the

A. Boiling point of water is raised
B. Pressure is constant
C. Heat is completely trapped
D. Temperature is evenly distributed
E. Volume of steam varies

Question 10:

• JAMB 1980

The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9, 19.3, 10.5. A metal ornament which weighs 0.425kg and can displace 50 x 10^-6m³m of water is made of

A. Zinc
B. Brass
C. Copper
D. Gold
E. Silver