An electric kettle (marked 3 kW) produces 3000 joules of heat every second. It is filled
with water, weighed and switched on.
After coming to the boil, it is left on for a
further 80 seconds and then switched off. It
is found to be 100 g lighter.
Calculate the specific latent heat of steam.
Suggest reasons why your answer does not
agree with the accepted value.

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

Explain why you think this diagram shows what happened to the carbon in the biodome.

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)