Physics General Relativity Study guides, Revision notes & Summaries

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 ...

2 © OCR 2023 F F 2 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 row contains only scalar quantities? A Absolute temperature, displacement, moment B Acceleration, force, momentum C Gravitational potential, kinetic energy, mass D Kinetic energy, mass, momentum Your answer [1] 2 Forces are applied to a circular shaft of diameter d. Which diagram shows a torque of a couple with magnitude Fd? F 2F ...

2 © OCR 2023 F F 2 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 row contains only scalar quantities? A Absolute temperature, displacement, moment B Acceleration, force, momentum C Gravitational potential, kinetic energy, mass D Kinetic energy, mass, momentum Your answer [1] 2 Forces are applied to a circular shaft of diameter d. Which diagram shows a torque of a couple with magnitude Fd? F 2F ...

The brakes of a car of mass 1200 kg are being tested on a track. The driver sees a hazard and applies the brakes. The graph shows the variation of the velocity v of the car with time t from when the driver sees the hazard to when the car stops. 20 v /m s –1 15 10 5 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 t/ s (a) (i) Calculate the acceleration a of the car while the brakes are applied. a = ................................................. m s –2 [1] (ii) Calculate the average brak...

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 is a typical value, in cm, for the wavelength of microwave radiation? A 0.0003 B 0.03 C 3 D 300 Your answer [1] 2 The diagrams show four systems of forces with three forces acting at a single point. The forces are in the same plane. The diagrams are drawn to scale. Which system could be in equilibrium? A B C D Your answer [1] 3 © O...

Answer all questions in this section. outside the box 0 1 Figure 1 shows apparatus used to measure the speed of sound in a steel rod. Figure 1 The steel rod is suspended from a beam using rubber bands. When the hammer is in contact with the end L of the steel rod, a circuit is completed and the signal generator is connected to the oscilloscope. Figure 2 shows the waveform then displayed on the oscilloscope. If you need a professional to complete your college homework at a small fee, the...

Lent Assessment Question & Answers 2024 3 Capacitor uses - ANSWER: Timing, smoothing out rectified curent, eliminating switch bounce 103 ceramic capacitor value - ANSWER: 10nF 104 ceramic capactior value - ANSWER: 100nF Calculate RT in parallel. - ANSWER: 1/Rt = 1/R1 + 1/R2 or Rt = (R1 x R2) / (R1 + R2) Calculate RT in series. - ANSWER: Rt = R1 + R2 Difference between size in electrolytic and ceramic - ANSWER: Electrolytic larger and polarised, ceramic smaller and on polarised For a pote...

vectors addition and subtraction