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2004 - WAEC Physics Past Questions and Answers - page 1

1

The molecular structure of a liquid is such that

A
the molecules have unlimited freedom of movement
B
molecular movement is restricted to vibration only
C
intermolecular collisions take place
D
all molecules moves move with the same speed
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2

Which of the following statements about the mass and the weight of a body is not correct? its

A
mass is a scalar quantity
B
weight is a function of the gravitational pull on it
C
mass on earth and on the moon is the same
D
weigh at the equatior and at the poles is the same
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3

An object weighs 60.0N in air, 48.2N in a certain liquid X, and 44.9N in water, Calculate the relative density of X

A
3.300
B
1.279
C
0.932
D
0.782
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4

Calculate the change in volume when 90g of ice is completely melted. [density of water = 1g cm-3, density of ice = 0.9cm-3]

A
0.00cm3
B
9.00cm3
C
10.00cm3
D
90.00cm3
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5

The diagram above represent displacement D, versus time, t graph of a progressive wave. Deduce the frequency of the wave

A
20 Hz
B
10 Hz
C
5 Hz
D
4 Hz
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6

Which of the following concept is not an evidence of the particle nature of matter?

A
diffusion
B
brownian motion
C
diffraction
D
crystallization
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7

A diver is 5.2m below the surface of water of density 1000Kgm-3. If the atmospheric pressure is 1.02 x 105pa. Calculate the pressure on the diver [g = 10ms-2]

A
6.20 x 104 pa
B
1.02 x 105 pa
C
1.54 x 105 pa
D
5.20 x 105 pa
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8

A steel needle floating on water, sinks when kerosine is added to the water. This is because the kerosine

A
increased the surface tension of the water
B
reduces the density of the water
C
reduces the surface tension of the water
D
reduces the upthrust on the needle
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9

On which of the following factor does the viscosity of a liquid depend? i. Nature of the liquid. ii. Temperature of the liquid. iii. Area of the liquid surface

A
i and ii only
B
ii and iii only
C
i and iii only
D
i, ii and iii
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10

An elastic string of force constant 200N m-1 is stretched through 0.8m within its elastic limit. Calculate the energy stored in the string

A
64.0J
B
80.0J
C
128.0J
D
160.0J
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