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MCAT Physics Formulas

Subjects : mcat, science

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. threshold frequency (photoelectric effect)
2pr
3a=Beta
?V=BetaV?T
Minimum frequency of light that will cause emission of an electron

2. determine spring constant
Upright image
F=xk=mg
Degree=p/180 radian
Vo^2+2a(?x)

3. speed of light in a vacuum (c) =
???
Mass
More flow less resistance
3a=Beta

4. increasing emf has What effect on ?G
Surface
It jumps to higher energy level
Makes ?G more negative thus more spontaneous
Moving charge

5. resistance in parallel
Is equal to gravitational force
1/Req=1/R1+1/R2+1/R3 Veq=V1=V2=V3
?x=1/2(v+vo)t
Virtual upright

6. parabolic mirror: image at focal point
When ?=90 b/c sin90=1
F=nv/2L
No image is formed
Farad 1 F= 1 c/v

7. electrical power
Difference between the absolute and atm pressure Pg=P- Patm
P=IV
X=(initial horizontal v)(time in air)
N=c/v

8. cohesion
Force a molecule of liquid feels toward the other molecules of the liquid
1/2mv^2
Insulator
P=1/f

9. When does turbulence in a fluid arise
3
Coulomb=amphere*sec
When velocity of the fluid exceeds critical velocity
Beta=

10. voltage of AC
Real inverted image
2 times the focal distance
Vrms=Vmax/v2
Low voltage to high voltage

11. wave velocity=
???
E=V/d
Body in motion remains in motion unless net force acts upon it
T=1/f

12. point of shape change beyond which a material can go back to normal
???
273K 0
Yield strength
Virtual upright

13. planet orbiting a star - centripetal force
The liquid itself not the object
Is equal to gravitational force
2 times the focal distance
Pressure to move - voltage when no charge is moving between 2 terminals

14. Formula for centripetal force
Sin=1/2 cos=v3/2
F=c/?
Spreading out of light as it passes through a narrow opening
F=mv^2/r

15. electric field of parallel plate capacitor
Virtual
Sin=v3/2 cos=1/2
Nsin?incident=nsin?refraction
E=V/d

16. Bernoulli's equation
P1+?gy of 1 + 1/2?v^2 of 1=P2+?gy of 2 + 1/2?v^2 of 2
Derive universal gravitation equation
F=xk=mg
Sin=0 cos=-1

17. sound level
Cohesion
Beta=10Log(I/Io)
Converted to extra kinetic energy of the emitted electron
P=m?v

18. freezing point of H2O in K and C
E=???=hc/?
273K 0
?=m/v kg/m^3 g/ml g/cm^3
Vo^2+2a(?x)

19. The bigger the cross - section of a resistor..
More flow less resistance
?=m/v kg/m^3 g/ml g/cm^3
Points away from + and toward -
20 Hz to 20 -000 Hz

20. Newtons 3rd law of motion
F=r/2
F=I(L*B)
2pvm/k
F=- F

21. diffraction
(1/2)?v^2
Derive universal gravitation equation
Beta=
Spreading out of light as it passes through a narrow opening

22. equation for kinetic friction
Gamma decay
2pvL/g
Is equal to gravitational force
Fk=

23. centripetal acceleration
Radiation
Gas to solid
A=v^2/r
Sin=0 cos=-1

24. larger the index of refraction..
The shortest wavelength
Slower light will travel
F=1/2(r)
Intensity

25. 'real' side of a lens
Points away from + and toward -
M1v1=m2v2
Side opposite From which light originates
?=2L/n

26. (-) magnification signifies
EV
It jumps to higher energy level
Inverted image
Voltage

27. equation relating heat gained and temperature change
Q=mc?t
Vsin?
(mass defect)(speed of light)^2
When ?=90 b/c sin90=1

28. relate velocities and displacement 2 ways
W=mg=?Vg
U=1/2QV=1/2CV^2=1/2Q^2/C
V^2=vo^2+2a?x ?x=1/2(vo+v)t
Emf is positive

29. for photoelectric material to liberate an electron
Work/time
Photon energy must be greater than work function of the material
Proton or neutron
R=pL/A

30. sublimation
Solid to gas
2
F1/A1=F2/A2
Increase length increase resistance

31. z in isotopic notation
Number of protons
F1/A1=F2/A2
F=Gm1m2/r^2
Angle of incidence=angle of reflection

32. osmotic pressure formula
MRT
When ?=90 b/c sin90=1
?=vk/m=2p??
N2>n1

33. image created by converging (concave) mirror when object is placed inside focal point
Fnet=0 thus Fg=Fs mg=kx
(mass defect)(speed of light)^2
Virtual upright
U=q?v

34. speed of sound in proportional to...
Vbulk modulus
V^2=vo^2+2a?x ?x=1/2(vo+v)t
Is equal to gravitational force
T=rF where F is proportional to mass and r is distance from pivot

35. 45
Vcos?
Sin=v2/2 cos=v2/2
F=I(L*B)
Resistor

36. light bends toward normal when
Fusion
N2>n1
E*r
A=v^2/r

37. velocity for a wave
V=???
Photon energy must be greater than work function of the material
273K 0
Beta=10Log(I/Io)

38. frequency of spring is proportional to...
Vsin?
Constant for closed system independent of changes in area
Spring constant
F=mv^2/r

39. equation for capacitance with dielectric
Fs=
Degree=p/180 radian
C=eoKA/D
1/Ceq=1/C1+1/C2+1/C3 Veq=V1+V2+V3

40. 30
R=pL/A
No image is formed
Charge/length
Sin=1/2 cos=v3/2

41. charge of beta particles
Inverted image
Angle of incidence=angle of reflection
The liquid itself not the object
Negative

42. center of curvature is...
Q=CV
Mass number
2 times the focal distance
Energy gained by particle with charge of e when moved through one volt

43. electric work
?L=aL?T
Side opposite From which light originates
Rate of doing work
U=q?v

44. intensity of sound
I=P/A
Vsin?
E=Pt
Sin=1/2 cos=v3/2

45. Gauss's Law
F=q/e0
Dispersion
100% of the object will be submerged but will not sink
E=V/d

46. capacitance equation in circuit
Buoyant force equals blocks weight
Image is always upright virtual and smaller
C=Q/V
Sin=1/2 cos=v3/2

47. ? of sound wave=
1/Req=1/R1+1/R2+1/R3 Veq=V1=V2=V3
V/??
Gamma decay
?=2L/n

48. electric flux
F=E*A
E=neE n is excess charge
V/??
?=m/v kg/m^3 g/ml g/cm^3

49. units for capacitance
Energy gained by particle with charge of e when moved through one volt
Farad 1 F= 1 c/v
N1>n2
Splitting of atomic nuclei

50. unit for energy beside J
EV
Vo^2+2a(?x)
Energy required to free electron from given metal
Increases