OCR Oxford Cambridge and RSA Thursday 9 June 2022 — Afternoon GCSE (9—1) in Combined Science B (Twenty First Century Science) J260/03 Physics (Foundation Tier) Time allowed: 1 hour 45 minutes

Document Content and Description Below

INSTRUCTIONS • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined page... s at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 95. • The marks for each question are shown in brackets [ ]. • Quality of extended response will be assessed in questions marked with an asterisk (*). • This document has 32 pages. ADVICE • Read each question carefully before you start your answer. You must have: • a ruler (cm/mm) • the Data Sheet for GCSE (9–1) Combined Science (Physics) B (inside this document) You can use: • an HB pencil • a scientific or graphical calculator Thursday 9 June 2022 – Afternoon GCSE (9–1) in Combined Science B (Twenty First Century Science) J260/03 Physics (Foundation Tier) Time allowed: 1 hour 45 minutes *9000840701* *J26003* 2 © OCR 2022 Answer all the questions. 1 Some waves are transverse waves and some are longitudinal waves. (a) Which of these waves are longitudinal waves? Put a ring around the correct option. Microwaves Ripples on water Sound waves X-rays [1] (b) (i) Complete the sentences about electromagnetic waves. Put a ring around each correct option. An example of an electromagnetic wave is electricity / light / sound. Electromagnetic waves are emitted by all objects and the wavelengths emitted depend on the mass / size / temperature of the object. [2] (ii) Give one other example of an electromagnetic wave. ...................................................................................................................................... [1] (c) The diagram shows a wave on a rope with measurements labelled A, B, C and D. A C B D (i) Which letter A, B, C, or D is the wavelength of the wave? ..................... [1] (ii) Which letter A, B, C, or D is the amplitude of the wave? ..................... [1] 3 © OCR 2022 Turn over (d) A sound wave from a violin has a frequency of 196Hz and wavelength of 1.75m in the air. Calculate the speed of the sound wave in air. Use the equation: wave speed = frequency × wavelength Wave speed = .................................................. m/s [2] 4 © OCR 2022 2 Jamal uses a microwave oven. The diagram shows the energy transfers taking place inside the microwave oven when it is used. Energy transferred electrically = 1250 J Energy transferred by the microwaves = 750 J Energy transferred to the surroundings = ........... J (a) Complete the diagram to show the energy transferred to the surroundings. [1] (b) Calculate the efficiency of the microwave oven. Use the equation: efficiency = useful energy transferred total energy transferred Give your answer as a percentage. Efficiency = ....................................................... % [3] 5 © OCR 2022 Turn over (c) Jamal cannot switch the microwave oven on unless the door is closed. This is because the microwaves can damage body cells. Why do microwaves damage body cells? Tick (3) one box. They are electromagnetic radiation. They are ionising radiation. They cause electric currents in the body. They transfer energy to cells heating them up. [1] 6 © OCR 2022 3 This diagram shows a greyhound accelerating at the start of a race. (a) A greyhound has a mass of 30kg and accelerates at 6.3m/ s2. Calculate the force the greyhound uses to accelerate. Use the Data Sheet. Force = ...................................................... N [3] 7 © OCR 2022 Turn over (b) The force to accelerate the stationary greyhound is provided by its muscles. Which diagram describes the transfer between energy stores when the greyhound does work to accelerate? A Energy stores Chemical Energy stores Kinetic and nuclear transferred to B Energy stores Chemical Energy stores Kinetic and thermal transferred to D Energy stores Elastic Energy stores Kinetic and chemical transferred to C Energy stores Elastic Energy stores Chemical and thermal transferred to Tick (3) one box. A B C D [1] (c) The greyhound runs for 540m in 30s. Calculate the average speed of the greyhound. Use the Data Sheet. Average speed = .................................................. m/s [3] 8 © OCR 2022 4 The scientific model of matter states that elements are made of atoms. (a) Complete the sentences to describe the nucleus of an atom. Put a ring around each correct option. All atoms have a positively charged nucleus because the nucleus contains electrons / neutrons / protons. The diameter of the nucleus is approximately 10–5m / 10–15m / 10–100m. [2] (b) The scientific model of the atom has changed over time. Draw lines, to connect the scientist to the description of the model they developed and the order in which it was developed. Scientist Description of model Order [4] Thomson Dalton Rutherford The atom contains small negative particles. They are spread through the positive atom. Atoms are small solid particles. Every atom of an element is the same. Most of the mass of the atom is concentrated in the centre of the atom. Very small particles orbit the mass at the centre. The first model of the atom. The second model of the atom. The third model of the atom. 9 © OCR 2022 Turn over (c) Describe how Bohr’s model of the atom is different to Rutherford’s model of the atom. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [2] (d) Which statements about atoms and electromagnetic radiation are true and which are false? Tick (3) one box in each row. True False Infrared radiation is emitted from the nuclei of atoms. Visible light is generated when electrons in atoms lose energy. X-rays have enough energy to ionise some atoms. Radio waves are absorbed by oxygen in the atmosphere to produce ozone. [3] 10 © OCR 2022 5 Kai has a model crane that is powered by a battery. The model crane is used to lift a box. Box (a) A constant current of 1.1A flows through the battery when the crane is switched on. Calculate the charge that flows through the battery in 2 minutes. Use the equation: charge = current × time Charge = ...................................................... C [3] 11 © OCR 2022 Turn over (b) Kai uses the crane to lift the box of 0.25kg from the floor to a height of 0.84m. (i) Calculate the gravitational potential energy gained by the box. Use the equation: gravitational potential energy = mass × gravitational field strength × height Gravitational field strength = 10N/ kg Gravitational potential energy = ....................................................... J [2] (ii) The box is then dropped and falls back down to the floor. How much kinetic energy does the box have just before it hits the floor? Kinetic energy = ....................................................... J [1] 12 © OCR 2022 6 Layla drives her car. (a) The speed of the car increases from 22m/s to 28m/s in 3s. Use the Data Sheet. Calculate the acceleration of the car. Acceleration ................................................. m/ s2 [3] (b) Complete the sentences to describe how energy is transferred as the car changes speed. Use words from the list. chemical elastic gravitational kinetic nuclear thermal The car increases its speed when energy is transferred from the fuel’s ....................................... store, to the car’s ....................................... store. Some energy from the fuel will be wasted when energy is transferred to the ....................................... store of the car and its surroundings. When the car brakes, energy is transferred from the car’s ....................................... store to the ....................................... store of the brakes, raising th [Show More]

Last updated: 1 year ago

Preview 1 out of 32 pages