Physics Paper 1 5.0 / 5 based on 1 rating ? PhysicsMixed topicsGCSEAQA Created by: ChelseaDowuonaCreated on: 11-11-18 12:05 Explain why having a more efficient motor increases the top speed of the car? -More useful energy is transferred to kinetic energy store of the car.This means that there is a lower proportion of energy wasted. 1 of 8 What is Gamma radiation? Electromagnetic radiation from nucleus. 2 of 8 Explain why a gamma emitter is used for x-rays. Gamma is the most penetrating so a large proportion of the emitted radiation will leave the body. Gamma is also more easily detected outside the body. 3 of 8 What is the definition of Half-Life? It is the average time it takes for the number of nuclei of isotope in a sample to halve. 4 of 8 Describe how equipment becomes irradiated. It is exposed to ionising radiation. 5 of 8 Why is irradiated equipment not hazardous? It does not become radioactive. 6 of 8 Approximately how many times smaller is a nucleus than an atom? 10,000 7 of 8 State what causes an electron's distance from the nucleus to increase or decrease? Increase-Absorbs electromagnetic radiation. Decrease-Emit electromagnetic radiation 8 of 8
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