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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. Vectors in momentum
T=2pvl/g
?U=Q + W - heat added= heat + work
Kinematic with Displacement - Velocity - Acceleration - and Time
px and py are conserved

2. Electron volts
R=rho L/A A=cross sectional area
F=kQ1Q2/r² BREAK INTO VECTORS
1ev=1.6E-19J
n1sin?1=n2sin90

3. Capacitors in series
V=added - Q=constant - C= 1/C
W=Fd=mad - direction of force must be same as direction of distance
R=rho L/A A=cross sectional area
Ug= Gm1m2/r

4. Centripetal acceleration
T=2pvl/g
a=v²/r
Fnx=FnSin?
f=mv²/r

5. 2nd right hand rule
P=IV
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
T=2pvm/k

6. U(spring) = ½kx²
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Spring Potential Energy
Kinematic with Velocity - Acceleration - and Displacement
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit

7. Basic thermo equation
Fb=mf g= rhof Vf g
?U=Q + W - heat added= heat + work
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
V=added - I=constant - R= added

8. Kirchhoffs Junction rule
Average Speed of each Molecule
n1sin?1=n2sin90
rho=m/v
Sum of all currents (I) entering=sum of all currents (I) leaving

9. Pressure (2 formulas)
Ug= Gm1m2/r
P=F/A=rho(g)h
V=(331 +.6T) T=temp in Celsius
counterclockwise

10. natural frequencies in a closed tube
L=n/4? has to be odd numbers
f=mv²/r
I=?q/?t
Flux (in webers)=Bcos?A

11. PV = nRT = NkT
Ideal Gas Law
Sum of all currents (I) entering=sum of all currents (I) leaving
T=2pvl/g
T=2pvl/g

12. Energy of gravitational attraction
T=2pvl/g
Thermal Conductivity
Ug= Gm1m2/r
R=rho L/A A=cross sectional area

13. Voltage-charges formula (2)
C=KepA/d
I=?q/?t
V=W/Q=KQ/r NO VECTORS
Flux (in webers)=Bcos?A

14. Net work
V=vFt/(m/l)
Force of Spring
W=KEf-KEi
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

15. Voltmeter
V=(331 +.6T) T=temp in Celsius
clockwise
added in parallel - measures volts - high resistance
J=?vm=F?t

16. Ideal gas laws
in series - measures current - low resistance
J=?vm=F?t
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
counterclockwise

17. PE of a spring
P=F/A=rho(g)h
T=2pvm/k
J=?vm=F?t
PE=1/2kx²

18. Banked curve - sum of the forces in the x
T=2pr/v
Archimedes Principle/Bouyancy
Fx=mv²/r=FnSin?
Force of Gravity

19. Net force/apparent weight broken done
Fnet=Fb-Fg
Average Molecular Kinetic Energy
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
V=?f

20. x = x0 + v0t + ½at²
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
?P=rho(g)?h
Fy=FnCos?-Fg
Kinematic with Displacement - Velocity - Acceleration - and Time

21. p = mv
P=mv (Kg m/s) or (N s)
R=rho L/A A=cross sectional area
?U=W - no heat added system (Q=0)
Momentum

22. Centripetal force
General Pressure
T=2pvl/g
f=mv²/r
counterclockwise

23. v² = v0² + 2a(x-x0)
I=?q/?t
Kinematic with Velocity - Acceleration - and Displacement
P=F/A=rho(g)h
Sum of all currents (I) entering=sum of all currents (I) leaving

24. Capacitance
I=?q/?t
Q=CV
F=ma
Kinematic with Velocity - Acceleration - and Time

25. Absolute pressure
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
T=2pvl/g
P=Patm + rho g h
Power from Energy

26. v = v0 + at
Adiabatic and isothermal processes ec= TH-TL/
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Kinematic with Velocity - Acceleration - and Time
Continuity

27. 3rd right hand rule
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
V=constant - I=added - R=1/r added
W=Fd=mad - direction of force must be same as direction of distance
KE=1/2mv²

28. Period for a spring in simple harmonic motion
?L=(coefficient of linear expansion)aLinitial?T
Fgx=FgCos?
V=(331 +.6T) T=temp in Celsius
T=2pvm/k

29. Elastic collision
Efficiency of a Heat Engine
billiard balls - no sticking total energy is conserved
Force of Spring
Temperature is constant - ?U=0 - -Q=W

30. Isovolumetric/isochoric
f=mv²/r
?v=0 - w=0 area under the curve is zero
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Constructive: 2t=m?+1/2? - Destructive: 2t=m?

31. Adiabatic process
P=Patm + rho g h
?U=W - no heat added system (Q=0)
f=mv²/r
Kinematic with Velocity - Acceleration - and Displacement

32. Power (circuts)
Fx=mv²/r=FnSin?
P=IV
F=kQ1Q2/r² BREAK INTO VECTORS
Power from Energy

33. Kirchhoffs loop rule [conservation of energy]
P=mv (Kg m/s) or (N s)
counterclockwise
Fy=FnCos?-Fg
sum of voltages must be zero

34. Isothermal process
Force of Spring
Fb=mf g= rhof Vf g
Temperature is constant - ?U=0 - -Q=W
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

35. Simple density formula
Fgx=FgCos?
Fgy=FgSin?
Fy=FnCos?-Fg
rho=m/v

36. Series Circuits
V=constant - I=added - R=1/r added
Fb=mf g= rhof Vf g
?U=W - no heat added system (Q=0)
V=added - I=constant - R= added

37. W
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
q=K?AT/L
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
L=n/2?

38. Magnitude of gravitational forces between objects
Momentum
V=constant - Q=added - C=added
Ug= Gm1m2/r
F=Gm1m2/r²

39. A1V1 = A2V2
Kinetic Energy
Work
Continuity
px and py are conserved

40. Natural frequency open tube/not in a tub
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
L=n/4? has to be odd numbers
a=v²/r
L=n/2?

41. W = F?rcos?
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
V=?f
V=IR
Work

42. Average kinetic energy
Bernoulli Principal
f=mv²/r
Archimedes Principle/Bouyancy
Kavg=(3/2)kbT

43. Banked curve - sum of the forces in the y
Fy=FnCos?-Fg
1/2QV=U
Ug= Gm1m2/r
billiard balls - no sticking total energy is conserved

44. P + pgy + ½pv² = const.
L=n/4? has to be odd numbers
Bernoulli Principal
1ev=1.6E-19J
Efficiency of an Ideal Engine

45. Voltage (circuts)
Momentum
V=IR
V=Ed
Average Speed of each Molecule

46. F(friction) = µN
Force of Friction
Ft=0
T=2pvl/g
f=mv²/r

47. Velocity of a wave
Continuity
n1sin?1=n2sin?2
V=?f
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

48. Isobaric process
Force of Gravity
Sum of all currents (I) entering=sum of all currents (I) leaving
Pressure is constant ?P=0 w=-P?V
T=2pvl/g

49. Parallel Circuits
V=constant - I=added - R=1/r added
KE=1/2mv²
q=K?AT/L
Kinematic with Displacement - Velocity - Acceleration - and Time

50. Flux
?P=rho(g)?h
Thermal Conductivity
P=Patm + rho g h
Flux (in webers)=Bcos?A