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If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?
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A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy $\left(K_{t}\right)$ as well as rotational kinetic energy $\left(K_{t}\right)$ simultaneously. The ratio $K_{t}:\left(K_{t}+K_{r}\right)$ for the sphere is
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A small sphere of radius r falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to
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The power radiated by a black body is P and it radiates maximum energy at wavelength, $\lambda_0$. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength $\dfrac{3}{4}\lambda_0$, 4 the power radiated by it becomes nP. The value of n is
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Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by $\triangle l$ on applying a force F, how much force is needed to stretch the socond wire by the same amount?
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A sample of 0.1 g of water at 100°C and normal pressure $(1.013 × 10^{5}Nm^{-2})$ requires 54 cal of heat energy to convert to steam at 100°C. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample, is
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The correct order of N-compounds in its decreasing order of oxidation states is
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Which one of the following elements is unable to form $MF_6^{3-}$ ion?
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Considering Ellingham diagram, which of the following metals can be used to reduce alumina?
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The correct order of atomic radii in group 13 elements is
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