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AP Physics Formulas

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. the electric force between two objects of charge Q
((Qin) -(Qout))/(Qin)
K |q||Q|/r^2
no heat flow
perfectly inelastic collision

2. radius of curvature of a charged particle as it enters a uniform magnetic field
mgCostheta(mu)d
m(v^2)/qvB
qrB/m
1/4wavelength

3. formula to find the absoluate pressure at the bottom of a pool
(Patm) + (Pgauge)
AV=(A2)(V2)
.5mV^2 + .5KA^2
qVB

4. formula for power with current and resistance
inelastic collision
(I^2)R
mgCostheta(mu)d
J= Ft

5. change in internal energy during a cyclic process
inelastic collision
0
-KA
V^2=(Vo)^2 +2a*change in x

6. isometric
GM*M/(r^2)
L -LCostheta
constant volume
(N2)/(N1)

7. type of collision where K is conserved
Ed=V
elastic collision
rF
roeVg

8. focal length of a mirror with radius d
qV
roeVg
d/2
1/((1/C)+(1/C)..........)

9. electric potential a distance r from a charge
Ed=V
deltaU -deltaW
constant pressure
KQ/r

10. voltage induced in a rod moving through a uniform magnetic field
2nt=mwavelength
opposite motion
BLv
(Di)/(Do) or (Hi)/(Ho)

11. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
.5KA^2
.5mV^2 + .5KA^2
nSintheta=nsintheta
h/mv

12. velocity of a molecule of gas
sqrt(3KT/m)
deltaU = deltaQ + deltaW
e=mc^2
perfectly inelastic collision

13. energy of a photon if wavelength is known
joules/second
(EMF)Rt/10
F/A
hc/wavelength

14. formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
h/mv
(EMF)Rt/10
1/2wavelength
pL/A

15. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
sqrt(3KT/m)
G M/((d/2)^2)
elastic collision
K |q||Q|/r^2

16. the force on a charge moving parallel to a magnetic field
(hc/wavelength)=h(Fo) +(Vs)
V^2=(Vo)^2 +2a*change in x
1/4wavelength
no force (right hand rule)

17. the units of current other than amps
J= Ft
BLv
Columbs/second
KI/r

18. formula for finding the magnetic field a distance r from a current carrying wire
KI/r
opposite motion
mgCostheta(mu)d
qV

19. formula for finding the momentum of a photon
L -LCostheta
constant volume
hc/wavelength
h/wavelength

20. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
qV
Q=CV
hc/wavelength
K |q||Q|/r^2

21. snells law
nSintheta=nsintheta
BA
frequency never changes for light problems
((Th) -(Tl))/(Th)

22. formula for constructive interference in a thin membrane with two phase changes
(1/Do) + (1/Di) = (1/f)
hc/wavelength
frequency never changes for light problems
2nt=mwavelength

23. adibatic
deltaU -deltaW
Joules/Columb
M(Lf)
no heat flow

24. second kinematic
.5KA^2
delta x = (Vo)t + .5at^2
roeVg
rF

25. formula for finding magnetic flux
(Fn)(mu)
V = (Vo) + at
.5mV^2 + .5KA^2
BA

26. hooke's law force of a spring
-KA
qrB/m
k|Q|/r^2
inelastic collision

27. force of gravity between two objects of mass m
n(Cv)(deltaT)
GM*M/(r^2)
L -LCostheta
((Qin) -(Qout))/(Qin)

28. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
2Pi * sqrt(l/g)
(hc/wavelength)=h(Fo) +(Vs)
elastic collision
1/2wavelength

29. pressure
((Th) -(Tl))/(Th)
KQ/r
J= Ft
F/A

30. velocity of an electrion as it exitws from the hole
L -LCostheta
qrB/m
Columbs/second
h/wavelength

31. formula for efficiency of a heat engine using work out
0
(Wnet)/(Qin)
Columbs/second
(V^2)/r

32. formula for critical angle
0
nSintheta=nsintheta
(N2)/(N1)
(No)(wavelength)=(Nn)(new wavelength)

33. formula for period of a pendulum
2Pi * sqrt(l/g)
net work = delta K
(V^2)/r
d/2

34. electric field in a distance r from a charge
-KA
k|Q|/r^2
2nt=mwavelength
constant pressure

35. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
(V^2)/r
M(Lf)
E/B
qE

36. formula for efficiency not using work out
no heat flow
((Qin) -(Qout))/(Qin)
inelastic collision
Ed=V

37. heat during a cyclic process (net heat)
deltaU = deltaQ + deltaW
constant volume
deltaU -deltaW
(I^2)RT

38. natural frequency of a closed tube of length L
0
(No)(wavelength)=(Nn)(new wavelength)
(1/Do) + (1/Di) = (1/f)
1/4wavelength

39. formula to find the gauge pressure at the bottom of a pool
n(Cv)(deltaT)
GM*M/(r^2)
(No)(wavelength)=(Nn)(new wavelength)
roegh

40. units for voltage other than volts
Joules/Columb
(Di)/(Do) or (Hi)/(Ho)
.5KA^2
1/4wavelength

41. new wavelength of light as it enters a new substance
V+IR
G M/((d/2)^2)
opposite motion
(No)(wavelength)=(Nn)(new wavelength)

42. formula for buoyant force
roeVg
(V^2)/R
perfectly inelastic collision
0

43. formula for torque
.5CV^2 or .5 Q^2/C or .5QV
rF
GM*M/(r^2)
h/wavelength

44. formula for finding the work function of a metal if the cutoff frequency is known
roeVg
h(Fo)
qV
BA

45. formula for power with Voltage and resistance
constant volume
(V^2)/R
0
Columbs/second

46. formula for impluse involving time
h/mv
mgCostheta(mu)d
J= Ft
no temp change

47. formula for charge stored in a capciator
(3/2)nRdeltaT
roeVg
Q=CV
(Patm) + (Pgauge)

48. work energy theorum
Ed=V
net work = delta K
(No)(wavelength)=(Nn)(new wavelength)
k|Q|/r^2

49. heat required to melt a substance
(hc/wavelength)=h(Fo) +(Vs)
mgCostheta(mu)d
M(Lf)
Columbs/second

50. new frequency of light as it enters a new substance
qVB
no temp change
(V^2)/R
frequency never changes for light problems