How much heat is required to convert 20 g of ice at 0°C to water at the same temperature? [Specific latent heat of ice = 336 Jg\(^{-1}\)]
When two objects, P and Q, are supplied with the same quantity of heat, the temperature change in P is observed to be twice that in Q. If the masses of P and Q are the same, calculate the ratio of the specific heat capacities of Q to P.
A ray of light is incident on mirror m\(_1\) and after reflection is incident on mirror m\(_2\) as shown in the diagram above. Calculate the angle of reflection of the ray at mirror m\(_2\).
A ray of light is incident on a body x as shown in the diagram above. What is the refractive index of the body?
Light travels in straight lines. In which of the following is this principle manifested? I. Pinhole camera II. Formation of shadows III. Diffraction of light IV. Occurrence of an eclipse.
