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Physics 4 Momentum, Machines, and Radioactive decay.txt
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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
Two things to remember about momentum
1
: conserved in an isolated system
2
: it is a vector
How to solve elastic collision vs inelastic collision problems
Elastic
: use conservation of energy
Inelastic
: (in an isolated system) use p(initial)=p(final)
Define impulse and give equation
Impulse (J)
: IAS equal to change in momentum
J=Δp
Equation for the average force on colliding bodies
J=FavgΔt
Equation to find average force from change in momentum
Δmv=FavgΔ t
Define a machine
Machine: mechanical device which reduces force to do work. Work does not change
Define radioactive decay
Radioactive decay: spontaneous breaking apart of atoms
Alpha decay
(Z-2) and (a-4)
Beta decay
Creation of an electron and proton from a neutron. Election is expelled
(Z+1) and (a+0) and (-e-1)
Positron emission
Expulsion of a positron when a proton becomes a neutron
(Z-1) (a+0) (+e-1)
Electron capture
Capture electron and merge it with a proton to form a neutron
(Z-1) (-e+1) (a-0)
Define fusion and fission
Fusion
: cumbining two nuclei to form a heavier nucleus
Fission
: splitting a nucleus to form two lighter nuclei
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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
2013-09-09T22:28:05Z
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