Extra Explaining Question - TRANSFER OF HEAT

TRANSFER OF HEAT

1.       An electric kettle is used to heat water. When the kettle is switched on, the energy is transferred to the water by a heating element at the bottom of the kettle.

(a)    State the process the transfers energy from the heating element to the water at the bottom of the kettle.

(b)    Eventually all of the water in the kettle becomes hot. Explain how energy is transferred from the water at the bottom of the kettle to the rest of the water.

2.       Your feet feel warmer on a carpet than they do a tiled kitchen floor. Give one reason why.

3.       The diagram shows a solar heating panel which is used to heat cold in a house.

a)       Describe how heat is transferred:

i)        From the sun to the solar heating panel.

ii)       From the hot water in the pipe to the colder water in the tank.

iii)     Throughout the water in the tank

b)      Explain why the pipes in the heating panel are painted black