# Physics

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 Author: frosenflame ID: 130393 Filename: Physics Updated: 2012-01-26 23:48:22 Tags: Physics Folders: Description: Physics Show Answers:

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1. displacement formuli
∆x=vi ∆t+ a (∆t)2
2. displacement vs distance
• displacement= net change in location
• distnce= travel path lentght
3. final velocity
• vf=vi+at
4. Newtons first law
An object at rest remains at rest, and an object in motion continues in motion with constant velocity (that is, constant speed in a straight line) unless the object experiences a net external force.
5. newtons second law
F=ma
6. Newtons Third Law
If two objects interact, the magnitude of the force exerted on object 1 by object 2 is equal to magnitude of the force exerted on object 2 by object 1, and these two forces are oppisate in direction.
7. coeficiant of static friction
8. coefficiant of kinetic friction
9. Force of friction
Ff= μFn
10. Work
W=FD
11. Kinetic energy
12. Work-Kinetic energy theorem
W= ∆KE
13. Elastic potential energy
• K=spring constant in N/m
14. Mechanical energy
ME=KE+PE
15. Conservation of mechanical energy
MEi=MEf
16. Power
17. Momentum
P=MV
18. Impulse momentum theorem
F∆T=∆p=mvf -mvi
19. conservation of momentum
Pi=Pf

20. Centripital Acceleration
21. Centripital Force
22. Keplers first law
Each planet travels in an elliptical orbit around the sun, and the sun is at one of the focal points
23. Keplers second law
An imaginary line drawn from the sun to any planet sweeps out equal areas in equal time intervals
24. keplers third law
the square of a planets orbital period (T2) is proportional to the cube of the average distance (r3) between the planet and the sun, or
25. period of an object in circular orbit
• Period= the time it takes for one orbit
26. orbital velocity
27. torque
28. Gravitational constant
29. Newtons Law of Universal Gravitation
30. Efficiency (mechanical)
31. Conservation of energy
32. Specific Heat Capacity
33. Caliometry
34. Latent Heat
35. Work done by a gas

36. Isovolumetric
• No work done
• ∆V=0
• so P∆V=0 and W=0
• Therefor ∆U=Q
37. First Law of Thermodynamics
∆U=Q-W
38. Isothermal
• No change in temperature or internal energy
• ∆T=0 so, ∆U=0; therefore, ∆U=Q-W=0; or
• Q=W
39. Abiabatic
• no energy transferd as heat.
• Q=0, so ∆U= -W
40. Isolated system
Ui=Uf
41. Efficiancy of a heat engine
42. Idele gases
• A gas behaves like an Idele gas when Tempeture is high and presure is low
43. Specific heat water

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