A kettle heats 0.80 kg of water from 20 °C to 100 °C.
The specific heat capacity of water is 4200 J/kg °C.
.1
Calculate the energy transferred to the water.
[3 marks].2
What is the internal energy of the water?
[1 mark]AQA GCSE Combined Science June 2022 Physics Paper 1F
5 questions on this paper's topics
23:001 of 5
An electric kettle has an input power of 2000 W. The useful power output, heating the water, is 1800 W.
.1
Calculate the efficiency of the kettle.
[2 marks].2
Calculate the power wasted by the kettle.
[1 mark].3
Give one way energy is wasted by the kettle.
[1 mark]The diagram shows a circuit.
.1
Name component X.
[1 mark].2
The lamp is off. Explain why the lamp lights when the switch is closed.
[2 marks].3
When the switch is closed, the reading on X is 0.20 A.
Calculate the charge that flows through the lamp in 60 s.
[2 marks]A student drops a ball of mass 0.20 kg from a height of 1.5 m.
Gravitational field strength = 9.8 N/kg.
.1
Which energy store of the ball decreases as it falls?
[1 mark].2
Calculate the energy transferred from this store as the ball falls 1.5 m.
[2 marks].3
Assume all of this energy is transferred to the ball's kinetic store.
Calculate the speed of the ball just before it hits the ground.
[2 marks]Alpha, beta and gamma are three types of nuclear radiation.
.1
Which type of radiation is the most penetrating?
[1 mark].2
Which type of radiation is made of two protons and two neutrons?
[1 mark].3
Give a material that stops beta radiation.
[1 mark]