Physics Past Questions and Answers

The phase difference between waves P and q in the diagram above is

The change in volume when 450kg of ice is completely melted is
[density of ice = 900 kgm^-3, density of water = 100 kgm^-3]

Tea pots are often silver-coated to prevent heat loss by

I. Wavelength
II. Medium of propagation
III. Wave velocity
IV. Frequency
V. Energy
Which of the above are used for characterizing waves?

A 50W electric heater is used to heat a metal block of mass 5kg. If in 10 minutes a temperature rise of 12^oC is achieved, the specific heat capacity of the metal is