What is the mass of a spherical stone with a diameter 25 mm, if the density of the stone is 2900 kg m-3?
A 2.82 x 10-9 kg
B 24g
C 190 g
D 3.55 x 108 kg
[1]
(Total for Question 2 = 1 mark)

The amount of heat required to change liquid water to vapor at its boiling temperature is 2256 kj/kg. the amount of heat required to change liquid mercury to its vapor state at its boiling temperature is 295 kj/kg. one kg of each substance is currently at its boiling point. how will the amount of thermal energy required to change each substance from a liquid to a gas differ?