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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. Power (circuts)
1/2QV=U
Adiabatic and isothermal processes ec= TH-TL/
P=IV
Power from Force

2. Thermal expansion
Kinematic with Displacement - Velocity - Acceleration - and Time
v3kT/m [mass per molecule] - v3RT/M [molar mass]
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
?L=(coefficient of linear expansion)aLinitial?T

3. P + pgy + ½pv² = const.
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Bernoulli Principal
Average Molecular Kinetic Energy
Kinematic with Displacement - Velocity - Acceleration - and Time

4. Resistivity in a wire
J=?vm=F?t
Kinematic with Velocity - Acceleration - and Displacement
R=rho L/A A=cross sectional area
Efficiency of an Ideal Engine

5. On an inclined plane - gravity in the x
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Fgx=FgCos?
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
V=constant - I=added - R=1/r added

6. Simple harmonic motion - pendulum
Pin=Pout=Fin/Ain=Fout/Aout
Continuity
1/2QV=U
T=2pvl/g

7. F-F or NF-NF
J=?vm=F?t
Efficiency of a Heat Engine
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
1ev=1.6E-19J

8. Velocity of sound in a strong
F=ma
V=vFt/(m/l)
T=2pvm/k
1ev=1.6E-19J

9. Isobaric process
V=vFt/(m/l)
Pressure is constant ?P=0 w=-P?V
1/2QV=U
J=?vm=F?t

10. a(centripetal) = v²/r
P=mv (Kg m/s) or (N s)
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
General Pressure
Centripetal Acceleration

11. Banked curve - sum of the forces in the y
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Fy=FnCos?-Fg
Vab=Rated voltage-IR (r=internal resistance)
F=BIL

12. H = (kA?T)/L
n1sin?1=n2sin90
billiard balls - no sticking total energy is conserved
Thermal Conductivity
Archimedes Principle/Bouyancy

13. Pascals principle
Pin=Pout=Fin/Ain=Fout/Aout
V=constant - Q=added - C=added
rho=m/v
Archimedes Principle/Bouyancy

14. F(buoy) = pVg
billiard balls - no sticking total energy is conserved
General Pressure
L=n/2?
Archimedes Principle/Bouyancy

15. Energy in a capacitor
Ug= Gm1m2/r
px and py are conserved
1/2QV=U
?U=W - no heat added system (Q=0)

16. Capacitors in series
Ideal Gas Law
V=added - Q=constant - C= 1/C
?U=Q + W - heat added= heat + work
Period in General

17. Positive torque
V=vFt/(m/l)
counterclockwise
C=KepA/d
rho=m/v

18. On a banked curve in circular motion - Fn in the x is
Fnx=FnSin?
Q=CV
?U=W - no heat added system (Q=0)
P=F/A=rho(g)h

19. F(gravity) = -(Gm1m2/r²)
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
?v=0 - w=0 area under the curve is zero
Force of Gravity
Vab=Rated voltage-IR (r=internal resistance)

20. Series Circuits
?L=(coefficient of linear expansion)aLinitial?T
V=added - I=constant - R= added
Ug= Gm1m2/r
Fnet=Fb-Fg

21. Electric field intensity
Archimedes Principle/Bouyancy
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
V=vFt/(m/l)
v3kT/m [mass per molecule] - v3RT/M [molar mass]

22. PV = nRT = NkT
T=2pvm/k
Fny=FnCos?
Ideal Gas Law
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

23. Standard pressure and temperature and pressure
in series - measures current - low resistance
F=Bvsin?q
273K and 1.013E5 pa
Flux (in webers)=Bcos?A

24. Impulse
V=?f
J=?vm=F?t
Pin=Pout=Fin/Ain=Fout/Aout
QH=QL +W and e=W/QH

25. Work - simple formula
W=Fd=mad - direction of force must be same as direction of distance
Ug= Gm1m2/r
Power from Force
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

26. Simple harmonic motion - spring
T=2pvm/k
Thermal Conductivity
Centripetal Acceleration
Period in General

27. Absolute pressure
F=Bvsin?q
P=Patm + rho g h
Average Speed of each Molecule
Efficiency of an Ideal Engine

28. Couloms law (force between two charged objects)
px and py are conserved
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
V=IR
F=kQ1Q2/r² BREAK INTO VECTORS

29. Ideal gas laws
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Gravitational Potential Energy Anywhere
V=constant - Q=added - C=added
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

30. Voltage-charges formula (2)
V=W/Q=KQ/r NO VECTORS
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
T=2pvm/k
Gravitational Potential Energy Anywhere

31. T = 1/f
Period in General
Pressure is constant ?P=0 w=-P?V
Kinematic with Velocity - Acceleration - and Displacement
Kavg=(3/2)kbT

32. Kirchhoffs loop rule [conservation of energy]
Pin=Pout=Fin/Ain=Fout/Aout
px and py are conserved
T=2pvm/k
sum of voltages must be zero

33. Centripetal force
Fnet=Fb-Fg
f=mv²/r
Vab=Rated voltage-IR (r=internal resistance)
Ft=0

34. Isothermal process
counterclockwise
Thermal Conductivity
Temperature is constant - ?U=0 - -Q=W
Force of Spring

35. Capacitors in parallel
V=vFt/(m/l)
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
V=constant - Q=added - C=added
Pin=Pout=Fin/Ain=Fout/Aout

36. Bernoulli's Equation [Conservation of energy]
?v=0 - w=0 area under the curve is zero
Fb=mf g= rhof Vf g
F=BIL
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

37. Potential energy
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
PE=mgh
V=W/Q=KQ/r NO VECTORS

38. Kirchhoffs Junction rule
Power from Force
W=Fd=mad - direction of force must be same as direction of distance
Flux (in webers)=Bcos?A
Sum of all currents (I) entering=sum of all currents (I) leaving

39. Dialectrics insulating sheet between plates
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Flux (in webers)=Bcos?A
C=KepA/d

40. Average kinetic energy
added in parallel - measures volts - high resistance
Kavg=(3/2)kbT
Fb=mf g= rhof Vf g
Adiabatic and isothermal processes ec= TH-TL/

41. e = abs(W/Q)
Fx=mv²/r=FnSin?
T=2pvm/k
Efficiency of a Heat Engine
F=Bvsin?q

42. F(friction) = µN
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
F=kx
Work
Force of Friction

43. torque
Force of Friction
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Kinematic with Velocity - Acceleration - and Time
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

44. Banked curve - sum of the forces in the x
Fx=mv²/r=FnSin?
V=IR
Centripetal Acceleration
Fgy=FgSin?

45. Engines (2 equations)
Fx=mv²/r=FnSin?
Kavg=(3/2)kbT
P=Patm + rho g h
QH=QL +W and e=W/QH

46. P(avg) = W/?t
Power from Energy
Force of Spring
Fny=FnCos?
?v=0 - w=0 area under the curve is zero

47. Critical speed is
Ft=0
PE=1/2kx²
f=mv²/r
px and py are conserved

48. Change in pressure
V=constant - Q=added - C=added
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
?P=rho(g)?h
?U=Q + W - heat added= heat + work

49. Negative torque
clockwise
Fnet=Fb-Fg
T=2pvl/g
?L=(coefficient of linear expansion)aLinitial?T

50. PE of a spring
PE=1/2kx²
Fgx=FgCos?
W=KEf-KEi
on a solenoid wrap finger around direction of current - thumb will point in north pole direction