Cosmic rays detected by a space probe are protons with a total energy of 3.0×109 eV3.0 \times 10^9 \text{ eV}3.0×109 eV. Calculate the velocity of these protons as a fraction of the speed of light ccc. Give your answer to 2 decimal places.
22 exam-style questions on AQA A Level Physics Special relativity (A-level only), covering The Michelson-Morley experiment (A-level only), Einstein's theory of special relativity (A-level only), Time dilation (A-level only), Length contraction (A-level only), and Mass and energy (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.