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.

Item 1

What does a physical map show?

the names of countries, states, and cities

the history of an area

the geographical features of an area

the rest stops and restaurants in an area

Explanation:

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.