Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Energy Resources and Energy Transfers
175 practice questions
Topics covered
Practice questions
31–40 of 175
Question 31
3 marks · Normal
Answer and see the solution →Explain how convection causes a breeze to blow from the sea towards the land during a sunny day at the beach. Include reference to temperature differences and movement of air.
Question 32
4 marks · Normal
Answer and see the solution →The diagram shows a cross-section of an external house wall constructed with two layers of brick and a cavity filled with insulation material.
(a)[2 marks]Explain why the walls of modern houses are made with a cavity containing insulation material rather than being solid brick.
(b)[2 marks]Name two ways that the cavity and the insulation reduce energy transfers from inside the house to outside, stating the method of energy transfer each affects.
Question 33
4 marks · Normal
Answer and see the solution →Describe an experiment to compare how quickly heat travels by conduction along rods made of copper and steel. Your answer should include apparatus, the method, the measurement you would take, and how you would know which material conducts heat better.
Question 34
1 mark · Normal
Answer and check →Which of the following is not a way to improve the energy efficiency of a house?
- A.Adding insulation to roof spaces
- B.Installing double-glazed windows
- C.Painting radiators with matt black paint
- D.Sealing gaps around doors and windows
Question 35
1 mark · Easy
Answer and check →Which physical quantity is equal to the work done on an object?
- A.Force
- B.Energy transferred
- C.Distance moved
- D.Power
Question 36
2 marks · Easy
Answer and see the solution →A small box is pushed with a force of 25 N along a smooth surface for a distance of 3 m in the direction of the force.
(a)[1 mark]State the equation relating work done, force and distance moved.
(b)[1 mark]Calculate the work done on the box.
Question 37
1 mark · Easy
Answer and see the solution →State the SI unit of work done.
Question 38
2 marks · Easy
Answer and see the solution →An athlete holds a heavy backpack still above their head for 10 seconds. Explain why no work is done on the backpack, even though the athlete is exerting a force upward.
Question 39
1 mark · Easy
Answer and see the solution →State the equation used to calculate the work done when a force moves an object in the direction of the force.
Question 40
1 mark · Easy
Answer and check →A force of 10 N moves an object 4 m in the same direction as the force. How much work is done?
- A.40 J
- B.14 J
- C.2.5 J
- D.0.4 J