The pressure on the gas of constant gas thermometer at the ice point is 325mm of mercury and at the steam point is 875mm of mercury. Find the temperature when the pressure of the gas is 190mm of mercury
A30k
B243k
C300k
D3003k
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Question 982
jamb1989
A piece of wood of mass 40g and uniform cross-sectional area of 2cm2 floats upright in water. The length of the wood immersed is
A30cm
B40cm
C20cm
D2cm
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Question 983
jamb1989
Which of the following devices are used to measure pressure? i. Aneroid barometer. ii. hydrometer. iii. hygrometer. iv. manometer.
Ai and iii
Bii and iii
Ciii and iv
Di and iv
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Question 984
jamb1989
A block-and-tackle system is used to lift a load of 20N through a vertical height of 10m. if the efficiency of the system is 40%, how much work is done against friction?
A80J
B120J
C300J
D500J
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Question 985
jamb1989
A thin film of liquid is trapped between two glass plates. The force required to pull the plates apart will increase if the
Asurface tension of the liquid is reduced
Bperpendicular distance between the plates is increased
Carea of the liquid surface in contact with the plates is increased
Dpressure of the air is decreased
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Question 986
jamb1989
Two points on a velocity time-graph have coordinates (5s, 10ms-1) and (20s, 20ms-1). Calculate the mean acceleration between the two points
A0.67ms-1
B0.83ms-1
C1.50ms-1
D2.00ms-1
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Question 987
jamb1989
The magnitude of the resultant of two mutually perpendicular forces, F1 and F2 is 13N, if the magnitude of F1 is 5N, what is the magnitude of F2?
A2.6N
B6.0N
C12.0N
D18.0N
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Question 988
jamb1989
Which of the following is a set of vectors?
Aforce, mass and moment
Bacceleration, velocity and moment
Cmass, weight and density
Dmass, volume and density
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Question 989
jamb1988
A particle is injected perpendicularly into an electric field, it travels along a curved path as depicted in the image above,the particle is
Agamma ray
Belectron
Cneutron
Dproton
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Question 990
jamb1988
In the circuit diagram above, the ammeter reads a current of 3A when R is 5 ohms and 6A when R is 2ohms, the value of the unknown resistance X is
A1
B2
C3
D4
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Question 991
jamb1988
The wire X in the figure above is at right angles to the plane of the paper and carries a current into the paper. at which of the points labelled 1-4, will the magnetic flux density due to this current be in the same direction as that of the horizontal component of earth's magnetic field
A1
B2
C3
D4
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Question 992
jamb1988
E,F and G are yellow, red and cyan transparent light filters respectively. The color of a white opaque object when viewed through the arrangement of the filters above is
Ayellow
Bred
Cblack
Dblue
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Question 993
jamb1988
In the figure above, what is the angle of reflection of the ray of light at mirror M\(_2\)?
A\( 90^{\circ} \)
B\( 60^{\circ} \)
C\( 45^{\circ} \)
D\( 30^{\circ} \)
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Question 994
jamb1988
The fig above shows two waveforms X and Y. If the frequency of X is 30Hz what is the frequency of Y
A12Hz
B19Hz
C60Hz
D75Hz
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Question 995
jamb1988
When one arm of a U-tube manometer is connected to a gas supply, the levels of mercury in the two arms of the U-tube is shown in the figure above, if the atmospheric pressure is 76.0cm hg, the gas pressure is
A62.6cm hg
B72.5cm hg
C79.5cm hg
D85.9cm hg
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Question 996
jamb1988
the fig above shows three different ways of hanging a heavy picture from a hook. the tension in the string will be?
AGreatest in X
BGreatest in Y
CGreatest in Z
DSame in each one
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Question 997
jamb1988
the fig above shows displacement-time graphs for three different motions. which of the following statements is correct?
Agraph 2 corresponds to the highest velocity
Bgraph 1 corresponds to zero velocity
Cgraph 3 corresponds to a particle moving in the negative x direction
Dgraph 2 corresponds to a particle moving in the positive x direction
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Question 998
jamb1988
Which of the following symbolic representations is correct for an atom X with 22 electrons and 43 neutrons?
A\(^{43}_{22}X\)
B\(^{22}_{43}X\)
C\(^{65}_{43}X\)
D\(^{65}_{22}X\)
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Question 999
jamb1988
In a certain fusion reaction, a deuteron (\(^{2}_{1}H\)) interacts with a triton (\(^{3}_{1}He\)) and produces an a-particle (\(^{4}_{2}He\)) and a second product. The second product is
