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Physics 4 Momentum, Machines, and Radioactive decay.txt

    • author "me"
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    • fileName "Physics 4 Momentum, Machines, and Radioactive decay"
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    • Define momentum and give equation
    • (p) measure of an objects tendency to continue along its path. Proportional to velocity and mass
    • p=mv
  2. Two things to remember about momentum
    • 1: conserved in an isolated system
    • 2: it is a vector
  3. How to solve elastic collision vs inelastic collision problems
    • Elastic: use conservation of energy
    • Inelastic: (in an isolated system) use p(initial)=p(final)
  4. Define impulse and give equation
    • Impulse (J): IAS equal to change in momentum
    • J=Δp
  5. Equation for the average force on colliding bodies
    J=FavgΔt
  6. Equation to find average force from change in momentum
    Δmv=FavgΔ t
  7. Define a machine
    Machine: mechanical device which reduces force to do work. Work does not change
  8. Define radioactive decay
    Radioactive decay: spontaneous breaking apart of atoms
  9. Alpha decay
    (Z-2) and (a-4)
  10. Beta decay
    • Creation of an electron and proton from a neutron. Election is expelled
    • (Z+1) and (a+0) and (-e-1)
  11. Positron emission
    • Expulsion of a positron when a proton becomes a neutron
    • (Z-1) (a+0) (+e-1)
  12. Electron capture
    • Capture electron and merge it with a proton to form a neutron
    • (Z-1) (-e+1) (a-0)
  13. Define fusion and fission
    • Fusion: cumbining two nuclei to form a heavier nucleus
    • Fission: splitting a nucleus to form two lighter nuclei
Author
p.reilly1227
ID
233871
Card Set
Physics 4 Momentum, Machines, and Radioactive decay.txt
Description
Physics 4 Momentum, Machines, and Radioactive decay.txt
Updated

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