Physics
Heat
Easy
Question
In crude model of a rotating diatomic molecule of chlorine (Cl2), the two Cl atoms are
apart and rotate about their centre of mass with angular speed 
. What is the rotational kinetic energy of one molecule of Cl2, which has a molar mass of 70.0g/mol?
The correct answer is:
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The radiation emitted by a star A is 1000 times that of the sun. If the surface temperatures of the sun and star A are 6000 K and 2000 K respectively, the ratio of the radii of the star A and the sun is:
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The rate of dissipation of heat by a black body at temperature T is Q. What will be the rate of dissipation of heat by another body at temperature 2T and emissivity 0.25?
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A black body at a high temperature TK radiates energy at the rate of EW/m2. When the temperature falls to (T/2) K, the radiated energy will be:
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