If a body of mass 10 kg is allowed to fall freely, its weight becomes______________?
If a body of mass 10 kg is allowed to fall freely, its weight becomes______________?
A. 0
B. 89N
C. 9.8 N
D. 10N
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The fission chain reaction in a nuclear reactor can be controlled by introducing _______________?A. Iron rods
B. Graphite rods
C. Cadmium rods
D. Platinum rodsWork done by the force of friction is____________________?
Work done by the force of friction is____________________?A. always positive
B. always negative
C. positive only for small frictional force
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Which of the following types of force can do no work on the particle on which it acts ?A. frictional force
B. gravitational force
C. elastic force
D. centripetal forceThe value of R ( Universal Gas Constant ) = ___________?
The value of R ( Universal Gas Constant ) = ___________?A. 8.314 J/mole K
B. 6.5 J/mole K
C. 1.314 J/mole K
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Ratio of the weight of H-atom to that of an electron is approximately______________?A. 18.336
B. 1836
C. 18360
D. 183.6A thing that emits its own light is___________________?
A thing that emits its own light is___________________?A. luminous
B. non-luminous
C. incandescent
D. bright