Explain why an ice cube submerged in a drink melts faster than an ice cube on a kitchen surface (the drink, surface and room temperature are all equal). (3 marks)
(1) In the drink, all six faces are in contact with the liquid (or) On the kitchen surface, only one of the faces is in contact with a solid and the rest are in contact with the air (or) On the kitchen surface, most of the faces are in contact with the air.
(1) Liquids have a higher particle collisions than gases because particles are packed together more densely (or converse)
(1) Therefore heat transfer occurs more quickly in a liquid (or) Therefore the rate of heat transfer is greater in a liquid (strong reasoning required)
AR
Related Physics GCSE answers
All answers ▸Sketch a graoh of current against potential difference for a filament lamp and explain its shape.
A box is at rest on a slope with an angle ϴ. Find an expression for the static friction coefficient, μ, of the box.
Explain how Pumped-storage hydropower (PSH) can store energy.
a) Give an example of an alpha radiation source used in homes b) Why is it safe to use a source of alpha radiation in the house