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 ▸

A 100kg weight is placed 0.75 meters from a see-saw on the right hand side. Dan is 75kg. How far away does he have to sit from the pivot on the left hand side to have it balance?


Compare the medical uses of ultrasound and X-rays. Your answer should include the risks, if any, and precautions, if any, associated with the use of ultrasound and X-rays. [6 marks]


What is the difference between speed and velocity?


A cyclist travels along a straight flat road. Describe the condition required for the cyclist to continue traveling along the road at a constant speed. How does this condition change if the cyclist travels up a slope?