Bconcentrate on the inner surface of the conductor
Cconcentrate at the outer flat surface of the conductor
Dgenerally concentrated at sharply curved surface
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Question 32
waec2004
The sound from a vibrating tuning sound is when the tip of its stem is placed on a wooden table than when in air because
Athe friction between the table and the tuning fork generates additional energy
Bair molecules obsorb sound wave but wood transmit sound waves
Cthe table increases the frequency of the turning fork
Da large mass of air is set into vibration by the table
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Question 33
waec2004
Which of the following reasons explains why the walls and ceilings of a standard concert hall are usually covered with perforated pads? To
Aincrease the intensity of sound waves
Bincreases the loudness of the sound waves
Creduce the effect of revibration of sound waves
Ddecreases thr frequency of sound waves
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Question 34
waec2004
A girl stand 80m away from a tall cliff and blows a whistle. If the speed of sound in air is 330ms-1, how long would it take for her to hear the echo of the sound?
A2.062s
B0.970s
C0.485s
D0.242s
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Question 35
waec2004
A magnified and virtual image of a near object is produced by
Aprism binoculas
Bastronomical telescope
Cperiscope
Dsimple microscope
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Question 36
waec2004
During a thunderstorm, lightning and thunder occurred simultaneously in the atmosphere. An observer on the earth surface's sees the lightning flash shortly before hearing the thunder. This is because the
Aatmospheric pressure is higher at the surface than at the higher altitudes
Bspeed of sound is less than that of light
Ctemperature of the atmosphere decreases with altitude
Datmospheric density decreases with altitude
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Question 37
waec2004
A man 1.8m tall stands 3m away from a pin hole camera. If the distance between the pin hole and the screen of the camera is 0.3m. Calculate the height of the image of the man produced by the camera
A0.18m
B0.50m
C1.62m
D18.00m
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Question 38
waec2004
The image of an optical pin placed at the principal focus of a concave mirror will be formed
Abetween the principal focus and the pole
Bat the centre of the curvature
Cbetween the principal focus and the centre of curvature
Dat infinity
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Question 39
waec2004
A wave travelling from water to glass suffers a change in its speed at the common boundary. Which of the following properties explains this observation?
Adispersion
Brefraction
Cinterference
Ddiffraction
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Question 40
waec2004
The basic difference between a transverse wave and a longitudinal wave travelling in the same direction in a medium is in the
Aamplitude of the wave
Bwavelength of the wave
Cdirection of vibration of the particles of the medium
Dperiod of vibration of the particle of the medium
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Question 41
waec2004
The temperature of 900cm3 of an ideal gas at a pressure of 114cm Hg is 27oC. Calculate its volume at 76cm Hg and 0oC
A50.0cm3
B546.0cm3
C659.3cm3
D1228.5cm3
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Question 42
waec2004
On a basis of the kinetic theory, an increase in the temperature of a fixed volume of an ideal gas causes
Aa incease in the number of gas molecules
Ba decrease in the density of the gass
Can increase in the average speed of the gas molecules
Da decrease in pressure exerted by the gas
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Question 43
waec2004
A faulty barometer reads 72.6cm Hg when the atmospheric pressure is 75.0cm Hg. Calculate the atmospheric pressure when the barometer reads 72.0cn Hg
A79.4cm Hg
B74.38cm Hg
C74.2cm Hg
D69.4cm Hg
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Question 44
waec2004
When a metal ball is heated through 30oC,its volume becomes 1.0018cm3. If the linear expansivity of the material of the ball is 2.0 x 10-5 K-1, calculate its original volume
A1.0000cm3
B1.0020cm3
C1.0036cm3
D1.0180cm3
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Question 45
waec2004
On a cold day, a concrete floor feels colder to the bear foot then a mat on the same floor because the
Ais better conductor of heat than the foot
Bmat loses heat to the bare foot at a faster rate
Cmat is better conductor of heat than the floor
Dconcrete floor is a better conductor of heat than the mat
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Question 46
waec2004
Which of the following values on the absolute scale of temperature is the ice point?
A0K
B32K
C100K
D273k
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Question 47
waec2004
When compared with water, mercury is preferred as a thermometric liquid because
Ahas a higher density
Bhas lower specific heat capacity
Cexhibits anomalous thermal expansion
Dcontains molecules which have very strong adhesive forces
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Question 48
waec2004
A loaded spring performs simple harmonic motion with an amplitude of 5cm. If the maximum acceleration of the load is 20cm s-1, calculate the angular frequency of the motion
A2 rad s-1
B4 rad s-1
C5 rad s-1
D10 rad s-1
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Question 49
waec2004
A ball bearing is projected vertically upwards from the ground with a velocity of 15ms-1. Calculate the time taken by the ball to return to the ground [g = 10ms-1]
A1.5s
B3.0s
C5.0s
D7.5s
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Question 50
waec2004
The bob of a single pendulum has a mass of 0.02kg. Determine the weight of the bob [g = 10ms-2]
