Physics Past Questions

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1801

The force with which an object is attracted to the earth is called its

A. acceleration
B. mass
C. gravity
D. impulse
E. weight

View Answer & Discuss (15) JAMB 1983

1802

The refractive index of liquid is 1.5. If the velocity of light in vacuum is 3.0 x 108ms-1, the velocity of light in the liquid is

A. 1.5 x 10⁸m^-1
B. 2.0 x 10⁸m^-1
C. 3.0 x 10⁸m^-1
D. 4.5 x 10⁸m^-1
E. 9.0 x 10⁸m^-1

View Answer & Discuss (4) JAMB 1983

1803

If relative density of a metal is 19, what will be the mass of 20cm3 of the metal when immersed in water?

A. 380g
B. 400g
C. 360g
D. 39g
E. 180g

View Answer & Discuss (19) JAMB 1983

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1804

Which of the following statements is true about liquid pressure is NOT correct? The pressure

A. at a point in a liquid is proportional to the depth
B. at any point in a liquid is the same at the same level
C. is exerted equally in all directions at any point
D. of a liquid at any point on the wall of its container acts in a direction perpendicular to the wall
E. at a particular depth depends on the shape of the vessel

View Answer & Discuss (9) JAMB 1983

1805

A ship travelling towards a cliff receives the echo of its whistle after 3.5 seconds. A short while later, it receives the echo after 2.5 seconds. If the speed of sound in air under the prevalling condition is 250ms ^-1, how much closer is the ship to the cliff?

A. 10m
B. 125m
C. 175m
D. 350m
E. 1,000m

View Answer & Discuss (6) JAMB 1983

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