Physics General Relativity Study guides, Class notes & Summaries

2 © OCR 2023 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 Which new feature of the atomic model did Niels Bohr suggest? A Electrons are in stable shells. B Electrons orbit a nucleus. C The atom has a nucleus. D The nucleus is positive. Your answer [1] 2 Two rooms have the same fixed volume. They contain identical gases at the same pressure. Room H is at a higher temperature than room L. Which statement...

2 © OCR 2023 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 In an experiment, three students work out values for the speed of sound. Student Speed of sound (m/s) 1 313 2 330 3 320 What is the range of values for the speed of sound? A 313m/ s – 320m/s B 313m/ s – 330m/s C 320m/ s – 330m/s D 321m/ s – 330m/s Your answer [1] 2 Which part of the plug is connected to the metal case of an appliance...

2 © OCR 2023 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 A spaceship travels from planet P to planet Q. The diagram shows the size of the forces acting on the spaceship. P Q Which sentence describes the motion of the spaceship? A It is accelerating. B It is decelerating. C It is staying at a constant speed. D Its speed is decreasing then increasing. Your answer [1] 2 Velocity is a vector. Which row ...

2 © OCR 2023 zinc cathode copper anode lemon resistor V Section A 1 A cell can be made by inserting a zinc cathode and a copper anode into a lemon. A high resistance voltmeter is used in the circuit shown in Fig. 1.1 to measure the p.d. across the lemon when different resistors are placed across the cell. Fig. 1.1 (a) Table 1 below shows the data recorded. Table 1 resistance / kΩ potential difference / mV current / μA 3.3 540 164 6.6 666 101 10.0 738 13.3 765 16.6 78...

2 © OCR 2023 SECTION A 1 Digestion is an example of an activation process. The energy required for a particular molecule to break apart is 1.2 × 10–19 J. (a) (i) Calculate the Boltzmann factor for this process. Human body temperature = 310K Boltzmann factor = ..........................................................[1] (ii) Explain how an individual particle can gain sufficient energy to complete a reaction when the energy required is far greater than the average energy of the part...

2 © OCR 2023 Section A You should spend a maximum of 40 minutes on this section. Write your answer for each question in the box provided. 1 The diagram shows a dot-plot of measurements of diameter at points along a wire. 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 diameter/mm Which of the following statements is correct? A A value of 0.17mm would be an outlier. B The percentage uncertainty in the value is 4%. C The range of the results is 0.08mm. D The spread of the results is ±0.1...

2 © OCR 2023 Section A 1 A ball is thrown with an initial speed of 14 ms –1 at an angle of 56° to the horizontal, as shown in the diagram. The ball leaves the thrower’s hand at a vertical distance of 1.7m above the ground. (a) Write down the horizontal and vertical components of velocity of the ball at the instant it is thrown. horizontal component, uH =....................................................... ms –1 vertical component, uV = ......................................

2 © OCR 2023 Section A You should spend a maximum of 25 minutes on this section. Write your answer to each question in the box provided. 1 What defines a weak material? A A low elastic limit B A low fracture stress C A low yield stress D A low Young modulus Your answer [1] 2 A sound wave has frequency 440Hz. The speed of sound in air is 330ms –1 . The wavelength of the sound wave is: A 75cm B 125cm C 1.45 m D 75m Your answer [1] 3 © OCR 2023 Turn over 12.0V 1.0 1.6...

The MAVEN spacecraft orbits Mars and studies its upper atmosphere. (a) The diagram below shows the orbit of MAVEN around Mars. orbit of MAVEN (i) Mark an X on the diagram to show the point in the orbit where MAVEN has maximum acceleration. [1] (ii) Explain how Kepler’s 1st law applies to MAVEN’s orbit around Mars. ........................................................................................................................................... ....................................

2 © OCR 2023 Section A You should spend a maximum of 30 minutes on this section. Write your answer to each question in the box provided. 1 Which of these units is a base unit? A A B J C m2 D N Your answer [1] 2 The accepted value of g is 9.81 ms–2 . In an experiment to verify the value of g, students obtained a value of 10.20ms–2 . What is the percentage difference between the students’ value and the accepted value of g? A 1% B 2% C 4% D 8% Your answer [1] 3 Which of ...