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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.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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 used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
V = (Vo) + at
net work = delta K
rF
(I^2)RT

2. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
G M/((d/2)^2)
(V^2)/r
K |q||Q|/r^2
.5KA^2

3. formula for efficiency not using work out
n(Cv)(deltaT)
KI/r
roeVg
((Qin) -(Qout))/(Qin)

4. formula for constructive interference in a diffraction grating
VI
dSintheta=mwavelength
pL/A
sqrt(T/(m/))

5. formula for finding the work function of a metal if the cutoff frequency is known
(3/2)nRdeltaT
(Patm) + (Pgauge)
constant volume
h(Fo)

6. equation for the first law of thermodynamics
deltaU = deltaQ + deltaW
constant pressure
(Di)/(Do) or (Hi)/(Ho)
joules/second

7. new frequency of light as it enters a new substance
opposite motion
frequency never changes for light problems
2Pi * sqrt(l/g)
.5mV^2 + .5KA^2

8. work energy theorum
net work = delta K
e=mc^2
qrB/m
(V^2)/R

9. lens/mirror equation
BA
(1/Do) + (1/Di) = (1/f)
net work = delta K
F/A

10. formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
1/4wavelength
((Th) -(Tl))/(Th)
(EMF)Rt/10
V = (Vo) + at

11. formula for impluse involving time
Q=CV
J= Ft
qE
AV=(A2)(V2)

12. new wavelength of light as it enters a new substance
GM*M/(r^2)
(No)(wavelength)=(Nn)(new wavelength)
(1/Do) + (1/Di) = (1/f)
MC(deltaT)

13. focal length of a mirror with radius d
(V^2)/R
frequency never changes for light problems
d/2
rF

14. formula for constructive interference in a thin membrane with two phase changes
mgCostheta(mu)d
(V^2)/r
2nt=mwavelength
1/((1/C)+(1/C)..........)

15. snells law
opposite motion
k|Q|/r^2
(V^2)/r
nSintheta=nsintheta

16. formula for finding the magnetic field a distance r from a current carrying wire
KI/r
sqrt(3KT/m)
rF
((Qin) -(Qout))/(Qin)

17. resistance of a wire
((Th) -(Tl))/(Th)
(No)(wavelength)=(Nn)(new wavelength)
pL/A
0

18. formula equating energy and mass
h/mv
e=mc^2
2Pi * sqrt(l/g)
k|Q|/r^2

19. the electric force between two objects of charge Q
sqrt(3KT/m)
K |q||Q|/r^2
mV -m(Vo)
roegh

20. isometric
0
constant volume
((Th) -(Tl))/(Th)
2nt=mwavelength

21. energy stored in a capacitor
qV
.5CV^2 or .5 Q^2/C or .5QV
M(Lf)
2nt=mwavelength

22. formula for centripetal acceleration
(Fn)(mu)
M(Lf)
1/4wavelength
(V^2)/r

23. formula for finding the momentum of a photon
(V^2)/r
MC(deltaT)
(N2)/(N1)
h/wavelength

24. type of collision where K is conserved
h/wavelength
AV=(A2)(V2)
elastic collision
0

25. the force on a charge in an electric field
K |q||Q|/r^2
no heat flow
qE
qrB/m

26. second kinematic
no heat flow
(No)(wavelength)=(Nn)(new wavelength)
.5mV^2 + .5KA^2
delta x = (Vo)t + .5at^2

27. force of gravity between two objects of mass m
GM*M/(r^2)
h/mv
V = (Vo) + at
J= Ft

28. the force on a charge moving parallel to a magnetic field
no force (right hand rule)
FV
AV=(A2)(V2)
KI/r

29. first kinematic
V = (Vo) + at
qrB/m
opposite motion
F/A

30. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
V^2=(Vo)^2 +2a*change in x
(hc/wavelength)=h(Fo) +(Vs)
MC(deltaT)
J= Ft

31. equation of continuity
AV=(A2)(V2)
1/((1/C)+(1/C)..........)
(Wnet)/(Qin)
net work = delta K

32. velocity of an electrion as it exitws from the hole
(1/Do) + (1/Di) = (1/f)
no temp change
qrB/m
AV=(A2)(V2)

33. formula for the wavelength (debroglie wavelength) of a moving particle
h(Fo)
(V^2)/R
h/mv
(Patm) + (Pgauge)

34. magnification equation
constant pressure
(Di)/(Do) or (Hi)/(Ho)
((Qin) -(Qout))/(Qin)
(Fn)(mu)

35. force of frction on an incline
qrB/m
qE
mgCostheta(mu)d
FV

36. heat during an isometric process
GM*M/(r^2)
n(Cv)(deltaT)
roegh
elastic collision

37. formula for Carnot efficiency
Joules/Columb
((Th) -(Tl))/(Th)
MC(deltaT)
.5KA^2

38. radius of curvature of a charged particle as it enters a uniform magnetic field
m(v^2)/qvB
dSintheta=mwavelength
(3/2)nRdeltaT
k|Q|/r^2

39. hooke's law force of a spring
(EMF)Rt/10
.5CV^2 or .5 Q^2/C or .5QV
-KA
perfectly inelastic collision

40. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
G M/((d/2)^2)
frequency never changes for light problems
qV
J= Ft

41. third kinematic
no heat flow
Ed=V
V^2=(Vo)^2 +2a*change in x
GM*M/(r^2)

42. force of friction
((Qin) -(Qout))/(Qin)
L -LCostheta
opposite motion
(Fn)(mu)

43. velocity of a molecule of gas
sqrt(3KT/m)
qVB
delta x = (Vo)t + .5at^2
Columbs/second

44. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
E/B
(Di)/(Do) or (Hi)/(Ho)
pL/A
qV

45. electric field in a distance r from a charge
qV
no heat flow
1/((1/C)+(1/C)..........)
k|Q|/r^2

46. formula for finding magnetic flux
BLv
(3/2)nRdeltaT
constant volume
BA

47. change in internal energy during a cyclic process
sqrt(T/(m/))
0
(I^2)R
(I^2)RT

48. type of collision where objects stick togerther
AV=(A2)(V2)
perfectly inelastic collision
(Fn)(mu)
sqrt(3KT/m)

49. energy of a photon if wavelength is known
perfectly inelastic collision
(N2)/(N1)
hc/wavelength
AV=(A2)(V2)

50. formula for charge stored in a capciator
.5CV^2 or .5 Q^2/C or .5QV
(Patm) + (Pgauge)
Q=CV
joules/second