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2003 - WAEC Physics Past Questions and Answers - page 1

1

A tuber of cassava can be processed into powder. This explains the face that

A
matter can change sponteneously from one state to another
B
matter cannot be destroyed
C
force is required to change natter from one state to another
D
matter is made up of tiny particle
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2

A piece of metal of relative density 5.0 weighs 60N in air. Calculate its weight when fully immersed in water

A
4N
B
5N
C
48N
D
60N
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3

The tendency of a body to remain at least when a force is supplied to it is called

A
impulse
B
momentum
C
inertia
D
friction
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4

A force acts on a body for 0.5s changing its momentum from 16.0kg ms-1 to 21.0kgms-1, calculate the magnitude of the force

A
42.0N
B
37.0N
C
32.0N
D
10.0N
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5

A moving object is said to have a uniform acceleration if its

A
displacement decreases at a constant rate
B
speed is directly proportional with time
C
velocity increases by equal amount in equal time intervals
D
velocity varies inversely with time
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6

The period of an oscillatory motion is defined as the

A
average of the time used in completing different numbers of oscillations
B
time to complete a number of oscillations
C
time to complete one oscillation
D
time taken to move from one extreme position to another
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7

The mass on a loaded spiral spring oscillates vertically between two extreme positions P and R equidistant from the equilibrium position Q. Which of the following statements about the system is not correct

A
the momentum of the mass is maximum at Q
B
the elastic potential energy of the spring is maximum at Q
C
the kinetic energy of the mass is maximum at P
D
the total energy of the system is always constant
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8

A ball f mass 5.0kg hits a smooth vertical wall normally with a speed of 2ms-1. Determine the magnitude of the resulting impulse

A
2.0kgms-1
B
10.0kgms-1
C
5.0kgms-1
D
2.5kgms-1
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9

Which of the following statements correctly defines a simple machine? a device

A
that can provide electric current
B
which can only carry people from one place to another
C
with which work can be done easily
D
which changes the state of rest or of uniform motion of an object along a straight ine
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10

A platinum resistance thermometer has a resistance 4(\Omega) at 0oC and 100(\Omega) at 100oC. Assuming the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45oC

A
14.0\(\Omega\)
B
6.7\(\Omega\)
C
3.2\(\Omega\)
D
2.7\(\Omega\)
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