Heat, Sound & Light Quiz

If we add ice to a tumbler containing water:

• heat will flow from water to ice

• heat will flow from ice to water

• heat will flow from water to ice if ice is more

• heat will flow from ice to water if ice is more

The temperature of pure melting ice is:

• 0^o C

• 100^o C

• 95^o C

• 98.6^o F

A thermometer uses:

• water

• mercury

• air

• none of the above

Which statement is correct?

• iron rims are cooled before they are placed on cart wheels

• a glass stopper gets tight on warming the neck of the bottle

• telephone wires sag in winters, but become tight in summers

• a little space is left between two rails on a railway track

Heat is liquids is transferred by:

• conduction

• convection

• radiation

• conduction & radiation

During convection, heat travels:

• sideways

• downwards

• upwards

• in all directions

The vacuum kept in between walls of a thermos flask reduces the heat transfer by:

• conduction only

• convection only

• radiation only

• conduction & convection

We can distinguish a shrill sound from a flat sound by its:

• amplitude

• loudness

• pitch

• none of these

We can hear sound of frequency:

• 10 Hz

• 500 Hz

• 1,00,000 Hz

• 50,000 Hz

Sound can not travel in:

• gases

• liquids

• solids

• vacuum