Physics: Electricity 0.0 / 5 ? PhysicsElectricityGCSEAQA Created by: Erin Harlyn-RoseCreated on: 20-04-21 17:47 after collecting metal you can turn this magnet off to drop the collected metal, used instead of a permanent magnet electromagnet 1 of 14 all atoms have the same number of ... and ... protons and neutrons 2 of 14 the atoms from different isotopes of gold have different numbers of... electrons 3 of 14 why does the alarm switch on when smoke particles enter the plastic casing? smoke absorbs and stops alpha radiation 4 of 14 why is it safe to use a source of alpha radiation in a house? alpha radiation cannot get through a lot so it cannot pierce the skin 5 of 14 a smoke alarm would not work with a radiation source that emits beta or gamma radiation, why? beta and gamma rays can get through the casing and no change is detected 6 of 14 why would the radiation source inside the smoke alarm need a long half-life? so that you don't need to keep replacing the smoke alarm because it lasts longer with a long half-life 7 of 14 used in telecommunications, TV and radio and it has no dangers. radio waves 8 of 14 used in radio and cooking and has dangers of burns and cataracts. microwaves 9 of 14 used in heating, cooking and night vision goggles. it has dangers of burns. infrared waves 10 of 14 used to see things and has dangers of eye damage. visible waves 11 of 14 used for nightlife, tanning and pollination. it has dangers of skin cancer. ultraviolet waves 12 of 14 used for medical imagery and security. it has dangers of cancer. x-ray waves 13 of 14 used for cancer treatment and observing the universe, it has dangers of cancer. gamma waves 14 of 14
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