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If P, Q, R and S denote energy, mass, angular momentum and gravitational constant respectively, the quantity Q5 S2PR2 has the dimensions of

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Important Questions on Physical World and Measurement

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If the energy E=Gphqcr, where G is the universal gravitational constant, c is the velocity of light in vacuum and h' is Planck's constant. The values of p,q and r are respectively
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A force F is given as F=Pt-1+Qt, where t denotes time. Then, the unit of P must be same as that of

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The angular speed of a fly-wheel making 180 rpm is ________
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A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero division of the circular scale coincides with 25 divisions above the reference level. If the screw gauge has a zero error of -0.004 cm. the correct diameter of the ball is__________