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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. snells law
(V^2)/R
constant pressure
roeVg
nSintheta=nsintheta

2. voltage induced in a rod moving through a uniform magnetic field
BLv
1/2wavelength
2Pi * sqrt(l/g)
no force (right hand rule)

3. equation of continuity
AV=(A2)(V2)
BA
opposite motion
pL/A

4. isobaric
constant pressure
V^2=(Vo)^2 +2a*change in x
AV=(A2)(V2)
h/mv

5. formula for impluse involving time
MC(deltaT)
mV -m(Vo)
J= Ft
(hc/wavelength)=h(Fo) +(Vs)

6. electric field in a distance r from a charge
K |q||Q|/r^2
k|Q|/r^2
(No)(wavelength)=(Nn)(new wavelength)
opposite motion

7. units for voltage other than volts
(V^2)/R
1/((1/C)+(1/C)..........)
net work = delta K
Joules/Columb

8. formula for energy of a spring mass when spring is at maximum displacement
nSintheta=nsintheta
FV
.5KA^2
deltaU = deltaQ + deltaW

9. natural frequency of a closed tube of length L
KQ/r
1/4wavelength
((Qin) -(Qout))/(Qin)
frequency never changes for light problems

10. velocity of a molecule of gas
Q=CV
sqrt(3KT/m)
V+IR
0

11. the force on a charge moving parallel to a magnetic field
(I^2)RT
FV
no force (right hand rule)
constant pressure

12. formula for Carnot efficiency
E/B
((Th) -(Tl))/(Th)
opposite motion
constant volume

13. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
(Di)/(Do) or (Hi)/(Ho)
G M/((d/2)^2)
sqrt(T/(m/))
(Wnet)/(Qin)

14. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
VI
h(Fo)
.5mV^2 + .5KA^2
h/mv

15. new frequency of light as it enters a new substance
KQ/r
no heat flow
(I^2)R
frequency never changes for light problems

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

17. formula to find the gauge pressure at the bottom of a pool
qV
roegh
0
2nt=mwavelength

18. the force on a charge in an electric field
((Th) -(Tl))/(Th)
qE
joules/second
h/wavelength

19. formula for centripetal acceleration
sqrt(T/(m/))
roeVg
(N2)/(N1)
(V^2)/r

20. heat during an isometric process
inelastic collision
KI/r
(hc/wavelength)=h(Fo) +(Vs)
n(Cv)(deltaT)

21. the electric force between two objects of charge Q
V = (Vo) + at
hc/wavelength
(1/Do) + (1/Di) = (1/f)
K |q||Q|/r^2

22. isothermal
((Th) -(Tl))/(Th)
no temp change
hc/wavelength
(hc/wavelength)=h(Fo) +(Vs)

23. type of collision where K is conserved
deltaU -deltaW
elastic collision
net work = delta K
KI/r

24. formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
(EMF)Rt/10
qrB/m
2Pi * sqrt(l/g)
V = (Vo) + at

25. third kinematic
net work = delta K
V^2=(Vo)^2 +2a*change in x
qrB/m
h/mv

26. what direction is friction?
E/B
-KA
(Patm) + (Pgauge)
opposite motion

27. lens/mirror equation
(1/Do) + (1/Di) = (1/f)
V = (Vo) + at
KQ/r
-KA

28. formula for critical angle
mV -m(Vo)
(N2)/(N1)
KI/r
KQ/r

29. heat during a cyclic process (net heat)
d/2
deltaU -deltaW
MC(deltaT)
h/wavelength

30. formula for period of a pendulum
dSintheta=mwavelength
qVB
no temp change
2Pi * sqrt(l/g)

31. formula to find the absoluate pressure at the bottom of a pool
BLv
L -LCostheta
V+IR
(Patm) + (Pgauge)

32. velocity of waves on a string if tension is known
sqrt(T/(m/))
(EMF)Rt/10
elastic collision
e=mc^2

33. type of collision where K is not conserved
BLv
inelastic collision
((Th) -(Tl))/(Th)
nSintheta=nsintheta

34. pressure
no heat flow
F/A
m(v^2)/qvB
no force (right hand rule)

35. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
d/2
E/B
0
J= Ft

36. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
.5mV^2 + .5KA^2
FV
((Th) -(Tl))/(Th)
(I^2)RT

37. change in internal energy during a cyclic process
0
joules/second
L -LCostheta
qrB/m

38. forgotten power equation
perfectly inelastic collision
joules/second
FV
((Th) -(Tl))/(Th)

39. focal length of a mirror with radius d
(I^2)RT
V+IR
V^2=(Vo)^2 +2a*change in x
d/2

40. formula for charge stored in a capciator
Q=CV
d/2
MC(deltaT)
rF

41. formula for impulse involving momentum
mV -m(Vo)
L -LCostheta
(I^2)R
KI/r

42. hooke's law force of a spring
Q=CV
G M/((d/2)^2)
qVB
-KA

43. energy stored in a capacitor
(Fn)(mu)
.5CV^2 or .5 Q^2/C or .5QV
no heat flow
(I^2)RT

44. magnification equation
no temp change
G M/((d/2)^2)
(Di)/(Do) or (Hi)/(Ho)
(No)(wavelength)=(Nn)(new wavelength)

45. formula for torque
(EMF)Rt/10
2nt=mwavelength
rF
roeVg

46. formula relating voltage and electric field
sqrt(3KT/m)
Ed=V
h(Fo)
GM*M/(r^2)

47. total capacitance of capacitors in series
V+IR
Ed=V
1/((1/C)+(1/C)..........)
FV

48. formula for finding the magnetic field a distance r from a current carrying wire
h(Fo)
KI/r
roeVg
KQ/r

49. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
1/2wavelength
(1/Do) + (1/Di) = (1/f)
constant volume
(hc/wavelength)=h(Fo) +(Vs)

50. formula for finding the work function of a metal if the cutoff frequency is known
h(Fo)
sqrt(3KT/m)
mV -m(Vo)
qV