If the distance between two suspended masses 10kg each is tripled, the gravitational force of attraction between them is reduced by
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2002
A body weighing 80N stands in an elevator that is about to move. The force exerted by floor on the body as the elevator moves upward with an acceleration of 5 ms-2 is[g = 10ms-2]
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2002
The hydrostatic blood pressure difference between the head and the feet of a boy standing straight is 1.65 x 104 Nm-2. Find the height of the boy.
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2002
A wheel and axle is used to raise a load of 500 N by the application of an effort of 250 N. If the radii of the wheel and the axle are 0.4 cm and 0.1 cm respectively, the efficiency of the machine is
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2002
A copper cube weighs 0.25 N in air, 0.17N when completely immersed in paraffin oil and 0.15 N when completely immersed in water.The ratio of upthrust in oil to upthrust in water is
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2002
The radiator of a motor car is cooled by
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2002
A coin place below a rectangular glass block of thickness 9cm and refractive index 1.5 is viewed vertically above the block. The apparent displacement of the coin is
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2002
The effect of a particle in a fluid attaining its terminal velocity is that the
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2002
A particle in circular motion performs 30 oscillation in 6 seconds. Its angular velocity is
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2002
Two force each of 10N acts on a body, one towards the north and the other towards the east.The magnitude and the direction of the resultant force are
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2002
Which of the following eye defects can be corrected using a cylindrical lens.
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2002
the property that is propagated in a traveling wave is
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2002
To produce an enlarged and erect image with a concave mirror,the object must be positioned
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2002
Which of the following is a characteristics of stationary waves?
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2002
I. Temperature.II. Density of air moleculesIII. PressureIV. Pitch Which of the above will affect the velocity of sound in the air
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2002
a ray of light which strikes a glass slab from air at normal incidence passes through the slab
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2002
water is a poor thermometric liquid because it
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2002
A concave mirror of radius of curvature 40 cm forms a real image twice as large as the object.The object distance is
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2002
If tension is maintained on a stretched string of length 0.6m, such that its fundamental frequency of 220Hz is excited, determine the velocity of the transverse wave in the string.
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2002
The time rate of loss of heat by a body is proportional to the