A short chain is usually attached to the back of a petrol tanker and trailing behind it so that the
Apetrol tanker is balanced on the road
Bheat generated by friction in the engine can be conducted to the earth
Ccharges generated by friction in the tanker are conducted to the earth
Dtanker can move slowly as the chain touches the road surface
Echain can produce sound in resonance with the noise from the tanker‘s engine
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Question 1842
waec1993
Which of the following is a percussion instrument?
AFlute
BOrgan
CBell
DPiano
ESonometer
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Question 1843
waec1993
The quality of a note produced by a vibrating string is determined by the
Apitch of the note
Btension of the string
Cmaterial of the string
Dpresence of overtones
Ethickness of the string
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Question 1844
waec1993
Which of the following is correct about light and sound waves?
ABoth of them are associated with energy transfer
BBoth of them need material media for propagation
Cthey are both longitudinal waves
Dtheir velocities in air are equal
EBoth of them can be polarized
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Question 1845
waec1993
A man stands in front of a tall wall and produces a sound. If he receives the echo of the sound two seconds later, calculate his distance from the wall. (The speed of sound in air is 330ms-1)
A600m
B400m
C330m
D328m
E165m
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Question 1846
waec1993
Which of the following have the longest wavelengths?
AInfra-red rays
BGamma rays
CX-rays
DUltra-violet rays
ERadio waves
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Question 1847
waec1993
In a ripple tank experiment, a vibrating plate is used to generate ripples in the water. If the distance between two successive troughs is 3.5 cm and the wave travels a distance of 31.5 cm in 1.5 s, calculate the frequency of the vibrator
A3.0Hz
B6.0Hz
C12.0Hz
D27.0Hz
E73.5Hz
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Question 1848
waec1993
An object is placed between two mirrors which are inclined at an angle of 120° and facing each other. Determine the number of images observed in the two mirrors
A1
B2
C3
D4
E5
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Question 1849
waec1993
A lens of focal length 15.0 cm forms an upright image four times the size of an object. Calculate the distance of the image from the lens
A11.3cm
B18.8 cm
C37.5cm
D45.0cm
E75.0cm
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Question 1850
waec1993
In the normal use of a simple microscope, a person sees an
Ainverted, virtual and magnified image
Berect, virtual and magnified image
Cerect, real and magnified image
Dinverted, real and magnified image
Einverted and real image the same size as the object.
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Question 1851
waec1993
The images formed by a diverging lens are always
Adiminished, virtual and inverted
Bdiminished inverted and real
Cdiminished, virtual and erect
Dmagnified, virtual and erect
Emagnified, real and inverted.
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Question 1852
waec1993
An image which cannot be formed on a screen is said to be
Ainverted
Breal
Cvirtual
Derect
Eblurred
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Question 1853
waec1993
Longitudinal waves cannot be
Adiffracted
Bretracted
Cpolarized
Dreflected
Esuperposed
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Question 1854
waec1993
Which of the following are correct of plane- polarized light? I. Plane polarization of light is the formation of hydrogen bubbles on the particles of light. II. Plane polarization of light is the splitting of light into its spectral components III. Plane-polarized light vibrates in one plane only. IV. Polarization is characteristic of transverse waves.
AI and II only
BI and IV only
CII and III only
DIII and IV only
EI and III only
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Question 1855
waec1993
A gas has a volume of 546 cm3 at OºC. What is the volume of the gas at -100ºC if its pressure remains constant?
A346cm3
B446cm3
C546cm3
D646cm3
E746 cm3.
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Question 1856
waec1993
A solid metal cube of side 10 cm is heated from
10oC to 60oC. lf the linear expansivity of the metal is 1.2 x 105K-1, calculate the increase in its volume.
A0.6cm3
B1.2 cm3
C1.8 cm3
D3.6 cm3
E6.0cm3.
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Question 1857
waec1993
The expansion of solids can be considered a disadvantage in the
Afire alarm system
Bthermostat
Criveting of steel plates
Dbalance wheel of a watch
Efitting of wheels on rims.
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Question 1858
waec1993
If the temperature of water is gradually increased from 0o to 4oC, the density of the water within this range
Aincreases for a while and then decreases
Bdecreases for a while and then increases
Cincreases gradually
Ddecreases gradually
Eremains the same
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Question 1859
waec1993
How far will a body move in 4 seconds if uniformly accelerated from rest at the rate of 2 ms-2?
A32m
B24m
C16m
D1.2m
E5m
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Question 1860
waec1993
An object is projected with a velocity of 100 ms\(^{-1}\) from the ground level at an angle \(\theta\) to the vertical. If the total time of flight of the projectile is 10 s, calculate θ. (g = 10 ms\(^{-2}\)).
