Card #1/28 Card #2/28 Topic: Resultant Forces Topic: F = ma Topic: Distance-TIme Graphs Card #3/28 Card #4/28 Topic: Velocity-Time Graphs
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Card #5/28 Card #6/28 Topic: Forces and Braking Topic: Forces and Terminal Velocity Topic: Hookes Law Card #7/28 Card #8/28 Topic: Forces and Energy
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Card #9/28 Card #10/28 Topic: Momentum Collisions Topic: Momentum Explosions Topic: Static Electricity Card #11/28 Card #12/28 Topic: Circuit Symbols
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Card #13/28 Card #14/28 Topic: Ohm s Law Topic: V vs I graphs for Components Topic: Series Circuits Card #15/28 Card #16/28 Topic: Parallel Circuits
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Card #17/28 Card #18/28 Topic: The three-pin plug and Electrical Cables Topic: Alternating Current Card #19/28 Card #20/28 Topic: Electrical Power Topic: E = V xq
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Card #21/28 Card #22/28 Topic: Atomic Structure Topic: Types of Radiation Draw and label the structure of an atom. What are the 3 main types of radiation? Use this to explain what an element is. What are they made of? Draw a table to show the mass and charge of the particles that make up an atom. Use this to explain why atoms have no overall charge. What are the ways we use these type of radiation for good? What are the dangers associated with each? Explain the meaning of the words isotope, ion, mass number and atomic number. Topic: Properties of Radiation Card #23/28 Card #24/28 Topic: Nuclear Equations for Decay HT only Describe the following properties of the 3 types of radiation: When the nucleus decays, either an alpha or beta particle is emitted from the nucleus. This means the new nucleus will have a different atomic and mass number. Range (how far it can go) Alpha Decay Beta Decay Penetrating Power (what it can get through) Ionising Power (how well it ionises things) Deflection in magnetic and electric fields Two protons and two neutrons are lost. Subtract 2 from the atomic number. Subtract 4 from the mass number. One electron is lost. Add 1 to the atomic number. (as if a neutron has turned into a proton) The mass number stays the same. Try these: Try these:
Card #22/28 Card #21/28 Radiation Type Structure Uses Dangers Element is a substance containing only one type of atom. Alpha (α) Helium nucleus (2 protons; 2 electrons) Smoke Detectors Very dangerous inside body (can t get out) Isotopes means two atoms of same element with same number of protons but different number of neutrons. Particle Charge Mass Beta (β) Gamma (γ) Electron from Nucleus EM radiation Monitoring thickness of materials Radiotherapy; Sterilizing Medical Equipment Very dangerous outside body as can pass through skin. Very dangerous outside body as can pass through skin. The number of protons and electrons must be equal so the atom is neutral. If electrons are lost, ions are formed. Proton +1 1 Neutron 0 1 Electron -1 0 Number of Protons = Number of Electrons = Atomic Number Number of Protons + Number of Neutrons = Mass Number Card #24/28 Card #23/28 Range in Air, Structure and Ionising Power Radiation Type Ionising Power Range Stopped by.. Alpha (α) High cm Paper Beta (β) Medium (-1 charge no mass) m Aluminium Gamma (γ) Low (no charge; no mass) longer Lead Properties in electric and magnetic fields Alpha deflected a little (charged but high mass); Beta deflected a lot (charged and low mass); Gamma not deflected (no charge)
Card #25/28 Card #26/28 Topic: Half Life Topic: Nuclear Fission What is half life? Which two nuclei can undergo nuclear fission? How can you calculate half life? What is nuclear fission? Explain the process. Why is nuclear fission sometimes called a chain reaction? Topic: Nuclear Fusion What is nuclear fusion? Where does nuclear fusion take place naturally? Card #27/28 Card #28/28 Topic: Life Cycle of A Star How are stars formed? What is the main sequence period of a star? List the different stages of the life cycle of a: small star large star Why are supernova significant?
Card #26/28 Card #25/28 The target nucleus is made from 235-uranium or 239-plutionium. The nucleus is bombarded with neutrons, one is absorbed and it splits. Radioactive substances have a half life; the average time it takes for the number of nuclei of an isotope in a sample to half. In other words the time it takes for the count rate to get to half its level. Each time a nucleus splits, 2 or 3 neutrons are released that could hit another nucleus. This is a chain reaction. Card #28/28 Card #27/28 Stars formed when lots of dust and gas in space pulled together by gravity This is when star is stable because forces within it (gravity, heat energy, etc) are stable. Hydrogen Isotopes collide and fuse together. A larger atom is produced and a lot of energy Elements above Fe in Periodic Table is released. This is the process that happens in stars. can only be formed in Supernovae (explosion), which spreads them around universe.