If the escape velocity on earth is $11.2 \mathrm{~km} / \mathrm{s}$, its value for a planet having double the radius and 8 time the mass of earth is
If the bulk modulus of water is $2 \times 10^9 \mathrm{Nm}^{-2}$, then the required pressure to reduce the given volume of water by $2 \%$ is
The surface tension of 70 dynes $/ \mathrm{cm}$ is equal to
Assertion A thermos bottle consists of a double walled glass vessel with the space between the two walls evacuated, so that the heat transfer between the contents of the bottle and outside is minimised.
Reason The vacuum between the two walls inhibits the heat transfer by radiation mechanism.
Which of the following is correct?
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