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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. isothermal
KI/r
no temp change
elastic collision
sqrt(T/(m/))

2. work energy theorum
.5KA^2
(EMF)Rt/10
e=mc^2
net work = delta K

3. heat required to change temperature of a substance
hc/wavelength
(Patm) + (Pgauge)
MC(deltaT)
inelastic collision

4. formula equating energy and mass
d/2
(N2)/(N1)
roeVg
e=mc^2

5. formula for critical angle
h(Fo)
F/A
Q=CV
(N2)/(N1)

6. snells law
qE
.5CV^2 or .5 Q^2/C or .5QV
FV
nSintheta=nsintheta

7. the force on a charge in an electric field
(V^2)/r
roeVg
V = (Vo) + at
qE

8. natural frequency of a closed tube of length L
F/A
h/mv
1/4wavelength
.5CV^2 or .5 Q^2/C or .5QV

9. new frequency of light as it enters a new substance
frequency never changes for light problems
FV
2nt=mwavelength
GM*M/(r^2)

10. formula for torque
constant volume
perfectly inelastic collision
(N2)/(N1)
rF

11. first kinematic
pL/A
sqrt(T/(m/))
((Th) -(Tl))/(Th)
V = (Vo) + at

12. the units of current other than amps
Columbs/second
(No)(wavelength)=(Nn)(new wavelength)
VI
(1/Do) + (1/Di) = (1/f)

13. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
(V^2)/R
.5mV^2 + .5KA^2
no force (right hand rule)
constant volume

14. type of collision where objects stick togerther
constant volume
FV
AV=(A2)(V2)
perfectly inelastic collision

15. formula for Carnot efficiency
constant volume
((Th) -(Tl))/(Th)
V+IR
qE

16. formula to find the gauge pressure at the bottom of a pool
qrB/m
roegh
qE
nSintheta=nsintheta

17. type of collision where K is conserved
2nt=mwavelength
elastic collision
no temp change
h(Fo)

18. voltage induced in a rod moving through a uniform magnetic field
(V^2)/r
BLv
no force (right hand rule)
GM*M/(r^2)

19. force a charge in a Bfield
M(Lf)
qVB
sqrt(T/(m/))
-KA

20. focal length of a mirror with radius d
((Qin) -(Qout))/(Qin)
FV
d/2
elastic collision

21. resistance of a wire
1/2wavelength
pL/A
constant volume
AV=(A2)(V2)

22. equation of continuity
(Patm) + (Pgauge)
qrB/m
AV=(A2)(V2)
FV

23. formula for impulse involving momentum
mV -m(Vo)
joules/second
qV
FV

24. heat required to melt a substance
FV
deltaU = deltaQ + deltaW
M(Lf)
(Di)/(Do) or (Hi)/(Ho)

25. energy stored in a capacitor
m(v^2)/qvB
(hc/wavelength)=h(Fo) +(Vs)
(1/Do) + (1/Di) = (1/f)
.5CV^2 or .5 Q^2/C or .5QV

26. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
E/B
constant volume
AV=(A2)(V2)
m(v^2)/qvB

27. third kinematic
KI/r
(I^2)RT
V^2=(Vo)^2 +2a*change in x
pL/A

28. formula for height of the block (at the start of a pendulum string) in terms of theta and L
(I^2)R
E/B
AV=(A2)(V2)
L -LCostheta

29. formula for power with Voltage and resistance
no force (right hand rule)
0
constant pressure
(V^2)/R

30. formula for impluse involving time
opposite motion
J= Ft
sqrt(3KT/m)
.5CV^2 or .5 Q^2/C or .5QV

31. formula for constructive interference in a thin membrane with two phase changes
((Qin) -(Qout))/(Qin)
V^2=(Vo)^2 +2a*change in x
2nt=mwavelength
(1/Do) + (1/Di) = (1/f)

32. formula for efficiency of a heat engine using work out
(Wnet)/(Qin)
Q=CV
(1/Do) + (1/Di) = (1/f)
no heat flow

33. formula relating voltage and electric field
(Di)/(Do) or (Hi)/(Ho)
inelastic collision
Ed=V
qV

34. 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
qE
inelastic collision
mgCostheta(mu)d

35. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
roegh
sqrt(T/(m/))
M(Lf)
(hc/wavelength)=h(Fo) +(Vs)

36. magnification equation
1/2wavelength
(Di)/(Do) or (Hi)/(Ho)
elastic collision
pL/A

37. lens/mirror equation
opposite motion
(1/Do) + (1/Di) = (1/f)
mV -m(Vo)
no heat flow

38. hooke's law force of a spring
qV
dSintheta=mwavelength
h/mv
-KA

39. formula for power with current and resistance
(I^2)R
qrB/m
1/2wavelength
deltaU -deltaW

40. electric field in a distance r from a charge
nSintheta=nsintheta
k|Q|/r^2
roeVg
2Pi * sqrt(l/g)

41. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
h/wavelength
rF
net work = delta K
G M/((d/2)^2)

42. new wavelength of light as it enters a new substance
(No)(wavelength)=(Nn)(new wavelength)
(V^2)/r
KI/r
qV

43. force of gravity between two objects of mass m
K |q||Q|/r^2
n(Cv)(deltaT)
GM*M/(r^2)
d/2

44. heat during an isometric process
Q=CV
n(Cv)(deltaT)
sqrt(3KT/m)
(hc/wavelength)=h(Fo) +(Vs)

45. formula for buoyant force
0
pL/A
roeVg
dSintheta=mwavelength

46. formula for period of a pendulum
BA
2Pi * sqrt(l/g)
-KA
Columbs/second

47. isometric
(Wnet)/(Qin)
d/2
k|Q|/r^2
constant volume

48. electric potential a distance r from a charge
KQ/r
L -LCostheta
net work = delta K
VI

49. formula for constructive interference in a diffraction grating
dSintheta=mwavelength
k|Q|/r^2
.5mV^2 + .5KA^2
(EMF)Rt/10

50. forgotten power equation
BA
qE
qV
FV