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AP Physics Formulas

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Answer 50 questions in 15 minutes.
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1. formula for finding the magnetic field a distance r from a current carrying wire
G M/((d/2)^2)
e=mc^2
KI/r
qE

2. formula relating voltage and electric field
k|Q|/r^2
Ed=V
MC(deltaT)
mV -m(Vo)

3. formula for the wavelength (debroglie wavelength) of a moving particle
n(Cv)(deltaT)
h/mv
roegh
F/A

4. equation of continuity
constant pressure
.5KA^2
V^2=(Vo)^2 +2a*change in x
AV=(A2)(V2)

5. heat required to change temperature of a substance
MC(deltaT)
KQ/r
mgCostheta(mu)d
Ed=V

6. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
((Th) -(Tl))/(Th)
qV
sqrt(3KT/m)
roegh

7. formula for finding the momentum of a photon
BLv
h/wavelength
V = (Vo) + at
qV

8. the force on a charge moving parallel to a magnetic field
(I^2)R
J= Ft
no force (right hand rule)
(Wnet)/(Qin)

9. formula to find the absoluate pressure at the bottom of a pool
2Pi * sqrt(l/g)
(Patm) + (Pgauge)
(Wnet)/(Qin)
(No)(wavelength)=(Nn)(new wavelength)

10. formula for energy of a spring mass when spring is at maximum displacement
.5KA^2
2nt=mwavelength
no heat flow
(I^2)RT

11. focal length of a mirror with radius d
no force (right hand rule)
(Di)/(Do) or (Hi)/(Ho)
d/2
perfectly inelastic collision

12. isothermal
constant volume
K |q||Q|/r^2
KI/r
no temp change

13. force of friction
(Fn)(mu)
((Qin) -(Qout))/(Qin)
perfectly inelastic collision
mgCostheta(mu)d

14. first kinematic
BLv
V^2=(Vo)^2 +2a*change in x
V = (Vo) + at
0

15. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
h/mv
(I^2)RT
KI/r
h/wavelength

16. formula equating energy and mass
F/A
roegh
(EMF)Rt/10
e=mc^2

17. formula for Carnot efficiency
roeVg
deltaU -deltaW
((Th) -(Tl))/(Th)
MC(deltaT)

18. heat during a cyclic process (net heat)
1/((1/C)+(1/C)..........)
deltaU -deltaW
joules/second
V+IR

19. formula for centripetal acceleration
G M/((d/2)^2)
constant pressure
E/B
(V^2)/r

20. natural frequency of an open tube of length L
1/2wavelength
1/4wavelength
no force (right hand rule)
(Di)/(Do) or (Hi)/(Ho)

21. type of collision where objects stick togerther
perfectly inelastic collision
J= Ft
joules/second
BA

22. third kinematic
(Patm) + (Pgauge)
V^2=(Vo)^2 +2a*change in x
.5KA^2
constant volume

23. formula for efficiency not using work out
MC(deltaT)
e=mc^2
(Fn)(mu)
((Qin) -(Qout))/(Qin)

24. heat during an isometric process
inelastic collision
nSintheta=nsintheta
n(Cv)(deltaT)
GM*M/(r^2)

25. force of gravity between two objects of mass m
M(Lf)
GM*M/(r^2)
AV=(A2)(V2)
no heat flow

26. formula for torque
((Qin) -(Qout))/(Qin)
MC(deltaT)
rF
.5CV^2 or .5 Q^2/C or .5QV

27. velocity of a molecule of gas
no force (right hand rule)
(Patm) + (Pgauge)
sqrt(3KT/m)
(3/2)nRdeltaT

28. the units of power other than watts
((Th) -(Tl))/(Th)
joules/second
(No)(wavelength)=(Nn)(new wavelength)
VI

29. isometric
rF
constant volume
E/B
constant pressure

30. formula for power with current and voltage
VI
delta x = (Vo)t + .5at^2
k|Q|/r^2
perfectly inelastic collision

31. the units of current other than amps
Columbs/second
2Pi * sqrt(l/g)
AV=(A2)(V2)
perfectly inelastic collision

32. electric field in a distance r from a charge
no force (right hand rule)
e=mc^2
k|Q|/r^2
M(Lf)

33. new wavelength of light as it enters a new substance
(Fn)(mu)
m(v^2)/qvB
(No)(wavelength)=(Nn)(new wavelength)
V = (Vo) + at

34. second kinematic
V^2=(Vo)^2 +2a*change in x
delta x = (Vo)t + .5at^2
k|Q|/r^2
e=mc^2

35. what direction is friction?
((Qin) -(Qout))/(Qin)
mgCostheta(mu)d
Q=CV
opposite motion

36. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
Columbs/second
2Pi * sqrt(l/g)
E/B
no temp change

37. formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
joules/second
(EMF)Rt/10
e=mc^2
1/2wavelength

38. formula for efficiency of a heat engine using work out
(Fn)(mu)
L -LCostheta
(Wnet)/(Qin)
opposite motion

39. adibatic
rF
VI
no heat flow
e=mc^2

40. formula for impulse involving momentum
qE
m(v^2)/qvB
mV -m(Vo)
K |q||Q|/r^2

41. units for voltage other than volts
perfectly inelastic collision
mV -m(Vo)
Joules/Columb
deltaU -deltaW

42. resistance of a wire
pL/A
KI/r
V = (Vo) + at
FV

43. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
((Th) -(Tl))/(Th)
G M/((d/2)^2)
no heat flow
BA

44. natural frequency of a closed tube of length L
(hc/wavelength)=h(Fo) +(Vs)
1/4wavelength
n(Cv)(deltaT)
h/mv

45. change in internal energy during a cyclic process
frequency never changes for light problems
(No)(wavelength)=(Nn)(new wavelength)
2nt=mwavelength
0

46. formula for finding magnetic flux
BA
rF
joules/second
hc/wavelength

47. type of collision where K is conserved
qrB/m
VI
inelastic collision
elastic collision

48. formula for change in internal energy in a cosnstat volume PV process
no temp change
.5CV^2 or .5 Q^2/C or .5QV
(3/2)nRdeltaT
opposite motion

49. radius of curvature of a charged particle as it enters a uniform magnetic field
m(v^2)/qvB
no force (right hand rule)
constant pressure
mgCostheta(mu)d

50. formula for period of a pendulum
deltaU -deltaW
2Pi * sqrt(l/g)
delta x = (Vo)t + .5at^2
2nt=mwavelength

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AP Physics Formulas

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