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AP Physics Formulas

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Answer 50 questions in 15 minutes.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
rF
no force (right hand rule)
qV
BLv

2. radius of curvature of a charged particle as it enters a uniform magnetic field
1/((1/C)+(1/C)..........)
(1/Do) + (1/Di) = (1/f)
m(v^2)/qvB
qV

3. formula for critical angle
(N2)/(N1)
e=mc^2
K |q||Q|/r^2
qV

4. heat required to melt a substance
M(Lf)
V = (Vo) + at
FV
(N2)/(N1)

5. formula to find the gauge pressure at the bottom of a pool
roegh
h(Fo)
dSintheta=mwavelength
perfectly inelastic collision

6. resistance of a wire
pL/A
hc/wavelength
L -LCostheta
qV

7. heat during a cyclic process (net heat)
AV=(A2)(V2)
rF
opposite motion
deltaU -deltaW

8. velocity of waves on a string if tension is known
qrB/m
mV -m(Vo)
(Fn)(mu)
sqrt(T/(m/))

9. electric potential a distance r from a charge
no force (right hand rule)
KQ/r
0
(I^2)R

10. formula for buoyant force
Ed=V
roeVg
K |q||Q|/r^2
Joules/Columb

11. first kinematic
mgCostheta(mu)d
roegh
V = (Vo) + at
F/A

12. formula for constructive interference in a thin membrane with two phase changes
.5KA^2
2nt=mwavelength
((Th) -(Tl))/(Th)
constant pressure

13. voltage induced in a rod moving through a uniform magnetic field
-KA
opposite motion
BLv
(Di)/(Do) or (Hi)/(Ho)

14. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
1/((1/C)+(1/C)..........)
BLv
E/B
roegh

15. formula for the wavelength (debroglie wavelength) of a moving particle
(Wnet)/(Qin)
GM*M/(r^2)
h/mv
BA

16. formula for period of a pendulum
no force (right hand rule)
m(v^2)/qvB
2Pi * sqrt(l/g)
(I^2)RT

17. forgotten power equation
FV
2nt=mwavelength
Joules/Columb
BLv

18. equation for the first law of thermodynamics
sqrt(3KT/m)
(V^2)/R
MC(deltaT)
deltaU = deltaQ + deltaW

19. electric field in a distance r from a charge
F/A
K |q||Q|/r^2
.5mV^2 + .5KA^2
k|Q|/r^2

20. type of collision where objects stick togerther
no heat flow
2Pi * sqrt(l/g)
rF
perfectly inelastic collision

21. heat during an isometric process
n(Cv)(deltaT)
(I^2)R
((Qin) -(Qout))/(Qin)
KQ/r

22. formula for change in internal energy in a cosnstat volume PV process
mgCostheta(mu)d
((Th) -(Tl))/(Th)
n(Cv)(deltaT)
(3/2)nRdeltaT

23. formula relating voltage and electric field
(hc/wavelength)=h(Fo) +(Vs)
V = (Vo) + at
Ed=V
inelastic collision

24. the units of current other than amps
net work = delta K
Columbs/second
h(Fo)
h/wavelength

25. velocity of an electrion as it exitws from the hole
deltaU = deltaQ + deltaW
0
1/((1/C)+(1/C)..........)
qrB/m

26. formula for power with current and resistance
mgCostheta(mu)d
(I^2)R
Ed=V
2Pi * sqrt(l/g)

27. the units of power other than watts
FV
joules/second
deltaU -deltaW
d/2

28. formula for torque
rF
elastic collision
Q=CV
roegh

29. energy stored in a capacitor
.5mV^2 + .5KA^2
1/2wavelength
(I^2)R
.5CV^2 or .5 Q^2/C or .5QV

30. the electric force between two objects of charge Q
2Pi * sqrt(l/g)
sqrt(T/(m/))
K |q||Q|/r^2
(hc/wavelength)=h(Fo) +(Vs)

31. focal length of a mirror with radius d
d/2
n(Cv)(deltaT)
(V^2)/R
((Qin) -(Qout))/(Qin)

32. natural frequency of an open tube of length L
sqrt(3KT/m)
1/2wavelength
roegh
(Fn)(mu)

33. formula for height of the block (at the start of a pendulum string) in terms of theta and L
L -LCostheta
h(Fo)
(Wnet)/(Qin)
inelastic collision

34. formula for impulse involving momentum
mV -m(Vo)
.5KA^2
(N2)/(N1)
elastic collision

35. work energy theorum
net work = delta K
perfectly inelastic collision
2nt=mwavelength
Columbs/second

36. formula for finding the magnetic field a distance r from a current carrying wire
2nt=mwavelength
KI/r
2Pi * sqrt(l/g)
sqrt(T/(m/))

37. velocity of a molecule of gas
1/((1/C)+(1/C)..........)
Ed=V
sqrt(3KT/m)
(EMF)Rt/10

38. magnification equation
2Pi * sqrt(l/g)
joules/second
(Di)/(Do) or (Hi)/(Ho)
BA

39. formula for Carnot efficiency
E/B
((Qin) -(Qout))/(Qin)
((Th) -(Tl))/(Th)
sqrt(3KT/m)

40. formula for constructive interference in a diffraction grating
0
dSintheta=mwavelength
-KA
Q=CV

41. new wavelength of light as it enters a new substance
h/mv
(No)(wavelength)=(Nn)(new wavelength)
V+IR
m(v^2)/qvB

42. type of collision where K is not conserved
inelastic collision
perfectly inelastic collision
qE
Joules/Columb

43. energy of a photon if wavelength is known
BA
hc/wavelength
BLv
no force (right hand rule)

44. third kinematic
deltaU = deltaQ + deltaW
E/B
V^2=(Vo)^2 +2a*change in x
V = (Vo) + at

45. formula for centripetal acceleration
J= Ft
k|Q|/r^2
1/2wavelength
(V^2)/r

46. force of frction on an incline
mgCostheta(mu)d
G M/((d/2)^2)
no heat flow
(Wnet)/(Qin)

47. total capacitance of capacitors in series
qV
AV=(A2)(V2)
h/wavelength
1/((1/C)+(1/C)..........)

48. adibatic
sqrt(T/(m/))
Columbs/second
((Th) -(Tl))/(Th)
no heat flow

49. formula for efficiency not using work out
qE
sqrt(3KT/m)
h(Fo)
((Qin) -(Qout))/(Qin)

50. second kinematic
delta x = (Vo)t + .5at^2
-KA
joules/second
K |q||Q|/r^2

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AP Physics Formulas

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