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AP Physics B: 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. PE of a spring
PE=1/2kx²
clockwise
Ideal Gas Law
Momentum

2. Absolute pressure
rho=m/v
P=Patm + rho g h
E=-N Change in flux/?t=Blv (v=velocity of the wire)
F=kx

3. Centripetal force
L=n/2?
Kavg=(3/2)kbT
f=mv²/r
clockwise

4. H = (kA?T)/L
n1sin?1=n2sin90
Thermal Conductivity
Power from Force
?v=0 - w=0 area under the curve is zero

5. Energy in a capacitor
px and py are conserved
Fnet=Fb-Fg
1/2QV=U
PE=1/2kx²

6. F(spring) = -kx
Force of Spring
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
R=rho L/A A=cross sectional area
Force of Gravity

7. Simple force equation
F=ma
Fx=mv²/r=FnSin?
F=kQ1Q2/r² BREAK INTO VECTORS
?L=(coefficient of linear expansion)aLinitial?T

8. Velocity of a wave
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
1/2QV=U
V=?f
clockwise

9. natural frequencies in a closed tube
?U=Q + W - heat added= heat + work
V=(331 +.6T) T=temp in Celsius
F=ma
L=n/4? has to be odd numbers

10. v = v0 + at
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Ft=0
Kavg=(3/2)kbT
Kinematic with Velocity - Acceleration - and Time

11. Kirchhoffs Junction rule
Sum of all currents (I) entering=sum of all currents (I) leaving
PE=mgh
T=2pr/v
Bernoulli Principal

12. Magnitude of gravitational forces between objects
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Continuity
F=ma
F=Gm1m2/r²

13. P(avg) = W/?t
V=constant - Q=added - C=added
Power from Energy
C=KepA/d
n1sin?1=n2sin?2

14. Vsound
Power from Force
L=n/2?
Q=CV
V=(331 +.6T) T=temp in Celsius

15. K = ½mv²
?v=0 - w=0 area under the curve is zero
Continuity
Thermal Conductivity
Kinetic Energy

16. Series Circuits
px and py are conserved
Archimedes Principle/Bouyancy
v3kT/m [mass per molecule] - v3RT/M [molar mass]
V=added - I=constant - R= added

17. heat flow through a window or door
Fnet=Fb-Fg
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
?P=rho(g)?h
q=K?AT/L

18. 1st right hand rule
P=W/T=FD/T=FV
Fnet=Fb-Fg
Adiabatic and isothermal processes ec= TH-TL/
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

19. W = F?rcos?
Pressure from Depth
F=Bvsin?q
Work
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

20. Capacitance
L=n/2?
Q=CV
Ug= Gm1m2/r
Constructive: 2t=m?+1/2? - Destructive: 2t=m?

21. Ammeter
in series - measures current - low resistance
V=added - Q=constant - C= 1/C
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
F=BIL

22. U(gravitational) = -(Gm1m2/r)
SG=rho object/10³
Power from Force
Gravitational Potential Energy Anywhere
Sum of all currents (I) entering=sum of all currents (I) leaving

23. Total internal reflection
V=vFt/(m/l)
R=rho L/A A=cross sectional area
n1sin?1=n2sin90
V=W/Q=KQ/r NO VECTORS

24. Negative torque
F=BIL
clockwise
V=Ed
F=Gm1m2/r²

25. Continuity equation [Conservation of mass]
Kinematic with Displacement - Velocity - Acceleration - and Time
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Q=CV
A1V1=A2V2

26. Average kinetic energy
Centripetal Acceleration
Kavg=(3/2)kbT
I=?q/?t
Fx=mv²/r=FnSin?

27. Period for a spring in simple harmonic motion
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
L=n/4? has to be odd numbers
T=2pvm/k
C=KepA/d

28. torque
QH=QL +W and e=W/QH
n1sin?1=n2sin90
F=kQ1Q2/r² BREAK INTO VECTORS
t=Fr - force must be perpendicular to the moment arm and the axis of rotation

29. Resistivity in a wire
F=Gm1m2/r²
V=?f
V=added - I=constant - R= added
R=rho L/A A=cross sectional area

30. Positive torque
Force of Gravity
v3kT/m [mass per molecule] - v3RT/M [molar mass]
I=?q/?t
counterclockwise

31. T = 1/f
f=mv²/r
Period in General
Force of Spring
Q=CV

32. Elastic collision
Gravitational Potential Energy Anywhere
P=mv (Kg m/s) or (N s)
billiard balls - no sticking total energy is conserved
PE=mgh

33. Ideal gas laws
T=2pvl/g
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
L=n/2?
P=mv (Kg m/s) or (N s)

34. Voltage across a battery terminal
Fnet=Fb-Fg
F=kQ1Q2/r² BREAK INTO VECTORS
F=ma
Vab=Rated voltage-IR (r=internal resistance)

35. Capacitors in parallel
T=2pvm/k
V=constant - Q=added - C=added
n1sin?1=n2sin90
a=v²/r

36. Momentum
Ideal Gas Law
P=mv (Kg m/s) or (N s)
Q=CV
Average Speed of each Molecule

37. e = abs(W/Q)
counterclockwise
Efficiency of a Heat Engine
sum of voltages must be zero
V=constant - Q=added - C=added

38. On a banked curve in circular motion - Fn in the x is
Period in General
Fnx=FnSin?
?L=(coefficient of linear expansion)aLinitial?T
rho=m/v

39. A1V1 = A2V2
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
clockwise
Force of Friction
Continuity

40. e = (T(hot) - T(cold))/T(hot)
Fnx=FnSin?
Efficiency of an Ideal Engine
Pin=Pout=Fin/Ain=Fout/Aout
Force of Friction

41. Banked curve - sum of the forces in the x
V=constant - I=added - R=1/r added
Fx=mv²/r=FnSin?
F=kx
Force of Friction

42. Power (circuts)
?P=rho(g)?h
Kavg=(3/2)kbT
P=F/A=rho(g)h
P=IV

43. Electric field intensity
added in parallel - measures volts - high resistance
?U=Q + W - heat added= heat + work
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
T=2pr/v

44. Thermal expansion
Fgx=FgCos?
Vab=Rated voltage-IR (r=internal resistance)
Efficiency of a Heat Engine
?L=(coefficient of linear expansion)aLinitial?T

45. Work - simple formula
Gravitational Potential Energy Anywhere
?v=0 - w=0 area under the curve is zero
W=Fd=mad - direction of force must be same as direction of distance
F=Gm1m2/r²

46. v = v(3RT)/M = v(3KT)/µ
W=KEf-KEi
Kavg=(3/2)kbT
Average Speed of each Molecule
C=KepA/d

47. Standard pressure and temperature and pressure
Continuity
273K and 1.013E5 pa
I=?q/?t
Efficiency of a Heat Engine

48. Period for a pendulum in simple harmonic motion
P=mv (Kg m/s) or (N s)
R=rho L/A A=cross sectional area
PE=mgh
T=2pvl/g

49. Impulse
C=KepA/d
Efficiency of an Ideal Engine
J=?vm=F?t
Kinematic with Velocity - Acceleration - and Displacement

50. Voltage (circuts)
V=IR
?v=0 - w=0 area under the curve is zero
Period in General
on a solenoid wrap finger around direction of current - thumb will point in north pole direction