Centre of Gravity: Physics Quiz Questions and Answers PDF Download - 173

Center of gravity of an object depends on it's

1. weight
2. mass
3. density
4. shape

Air conditioners are good example of

1. conduction
2. convection
3. radiation
4. conduction and radiation both

If we put some water in a pot and put it over the Bunsen burner, the thermal energy supplied to the water would lead to a gain in

1. external energy
2. internal energy
3. chemical energy
4. physical energy

Angle of incidence in optically denser medium for which angle of refraction in less dense medium is 90° is termed as

1. normal angle
2. covalent angle
3. critical angle
4. internal angle

Heat capacity of a substance is equal to

1. the amount of heat required to raise the temperature of a 1 kg of a substance by 1 K
2. the amount of heat required to raise the temperature of a substance by 1 K
3. the amount of heat required to change the phase of a substance from solid to liquid without any change in temperature
4. the amount of heat required to change the phase of a substance from liquid to gas without any change in temperature