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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.
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. Centripetal force
?L=(coefficient of linear expansion)aLinitial?T
Thermal Conductivity
Archimedes Principle/Bouyancy
f=mv²/r

2. W = F?rcos?
in series - measures current - low resistance
Force of Spring
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Work

3. F(buoy) = pVg
Archimedes Principle/Bouyancy
f=mv²/r
Pin=Pout=Fin/Ain=Fout/Aout
Vab=Rated voltage-IR (r=internal resistance)

4. Bernoulli's Equation [Conservation of energy]
Force of Friction
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Fnet=Fb-Fg
KE=1/2mv²

5. Voltage-charges formula (2)
V=W/Q=KQ/r NO VECTORS
Ug= Gm1m2/r
SG=rho object/10³
F=Gm1m2/r²

6. On a banked curve in circular motion - Fn in the y is
Fny=FnCos?
Thermal Conductivity
T=2pr/v
Force of Spring

7. Couloms law (force between two charged objects)
F=kQ1Q2/r² BREAK INTO VECTORS
Pressure is constant ?P=0 w=-P?V
Period in General
Ug= Gm1m2/r

8. v = v(3RT)/M = v(3KT)/µ
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Average Speed of each Molecule
q=K?AT/L
F=Gm1m2/r²

9. Force on a charged particle in a magnetic field
Archimedes Principle/Bouyancy
F=Bvsin?q
sum of voltages must be zero
L=n/2?

10. x = x0 + v0t + ½at²
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Force of Friction
Fgx=FgCos?
Kinematic with Displacement - Velocity - Acceleration - and Time

11. Standard pressure and temperature and pressure
Ft=0
273K and 1.013E5 pa
V=(331 +.6T) T=temp in Celsius
V=added - I=constant - R= added

12. v² = v0² + 2a(x-x0)
?v=0 - w=0 area under the curve is zero
Gravitational Potential Energy Anywhere
V=added - I=constant - R= added
Kinematic with Velocity - Acceleration - and Displacement

13. Simple density formula
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Fx=mv²/r=FnSin?
q=K?AT/L
rho=m/v

14. 2nd right hand rule
Fx=mv²/r=FnSin?
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
V=constant - Q=added - C=added
moment arm - perpendicular distance from the force to the axis of rotation

15. PE of a spring
a=v²/r
billiard balls - no sticking total energy is conserved
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
PE=1/2kx²

16. Power - simple formula (mechanics)
F=kx
Efficiency of an Ideal Engine
1/2QV=U
P=W/T=FD/T=FV

17. Centripetal acceleration
a=v²/r
Adiabatic and isothermal processes ec= TH-TL/
billiard balls - no sticking total energy is conserved
Efficiency of an Ideal Engine

18. P = Fvcos?
Kinematic with Velocity - Acceleration - and Time
sum of voltages must be zero
Power from Force
Fy=FnCos?-Fg

19. Potential energy
Momentum
Thermal Conductivity
PE=mgh
rho=m/v

20. The three kinematics equations
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Ug= Gm1m2/r
P=IV
A1V1=A2V2

21. Vsound
T=2pvl/g
n1sin?1=n2sin?2
Kavg=(3/2)kbT
V=(331 +.6T) T=temp in Celsius

22. Average kinetic energy
Sum of all currents (I) entering=sum of all currents (I) leaving
Kavg=(3/2)kbT
?P=rho(g)?h
Momentum

23. Power (circuts)
T=2pr/v
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
General Pressure
P=IV

24. Carnot engine
Adiabatic and isothermal processes ec= TH-TL/
?U=W - no heat added system (Q=0)
sum of voltages must be zero
V=constant - Q=added - C=added

25. natural frequencies in a closed tube
L=n/4? has to be odd numbers
Power from Energy
Thermal Conductivity
V=W/Q=KQ/r NO VECTORS

26. Parallel Circuits
Q=CV
T=2pvm/k
V=constant - I=added - R=1/r added
V=?f

27. Energy in a capacitor
1/2QV=U
px and py are conserved
A1V1=A2V2
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force

28. P = F/A
Kinematic with Velocity - Acceleration - and Displacement
Average Speed of each Molecule
General Pressure
Centripetal Acceleration

29. Change in pressure
V=?f
?P=rho(g)?h
Work
F=kx

30. Voltmeter
added in parallel - measures volts - high resistance
P=F/A=rho(g)h
P=mv (Kg m/s) or (N s)
Bernoulli Principal

31. F(friction) = µN
Force of Friction
Fx=mv²/r=FnSin?
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Fnx=FnSin?

32. Capacitors in parallel
V=W/Q=KQ/r NO VECTORS
Centripetal Acceleration
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
V=constant - Q=added - C=added

33. heat flow through a window or door
V=(331 +.6T) T=temp in Celsius
q=K?AT/L
F=Gm1m2/r²
Kinetic Energy

34. Energy of gravitational attraction
R=rho L/A A=cross sectional area
Ug= Gm1m2/r
T=2pvl/g
Archimedes Principle/Bouyancy

35. Pressure (2 formulas)
L=n/2?
Fnx=FnSin?
Bernoulli Principal
P=F/A=rho(g)h

36. A1V1 = A2V2
Kinetic Energy
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Continuity
Vab=Rated voltage-IR (r=internal resistance)

37. Period for a spring in simple harmonic motion
T=2pvm/k
1ev=1.6E-19J
Fb=mf g= rhof Vf g
Efficiency of a Heat Engine

38. Impulse
Bernoulli Principal
P=W/T=FD/T=FV
Efficiency of a Heat Engine
J=?vm=F?t

39. P(avg) = W/?t
Power from Energy
Flux (in webers)=Bcos?A
Kinematic with Velocity - Acceleration - and Time
Pressure from Depth

40. Isobaric process
Pressure is constant ?P=0 w=-P?V
Work
?P=rho(g)?h
?L=(coefficient of linear expansion)aLinitial?T

41. Current
I=?q/?t
Adiabatic and isothermal processes ec= TH-TL/
V=?f
?U=W - no heat added system (Q=0)

42. On an inclined plane - gravity in the x
Fgx=FgCos?
PE=1/2kx²
F=Gm1m2/r²
Gravitational Potential Energy Anywhere

43. Voltage-parallel plates
Ideal Gas Law
V=Ed
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

44. Basic thermo equation
?U=Q + W - heat added= heat + work
clockwise
V=vFt/(m/l)
T=2pvl/g

45. Simple harmonic motion - pendulum
T=2pvl/g
Power from Force
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Constructive: 2t=m?+1/2? - Destructive: 2t=m?

46. 3rd right hand rule
?U=Q + W - heat added= heat + work
T=2pr/v
Gravitational Potential Energy Anywhere
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force

47. P + pgy + ½pv² = const.
V=constant - I=added - R=1/r added
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
px and py are conserved
Bernoulli Principal

48. Negative torque
?U=Q + W - heat added= heat + work
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
clockwise
q=K?AT/L

49. 1st right hand rule
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
added in parallel - measures volts - high resistance
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

50. torque
KE=1/2mv²
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
F=BIL
Pressure is constant ?P=0 w=-P?V