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MCAT Physics Formulas

Subjects : mcat, science

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. index of refraction (n) equation
Pressure to move - voltage when no charge is moving between 2 terminals
N=c/v
700nm -400nm
???

2. incandescence
No net force acting on it
Coulomb=amphere*sec
Light emitted due to heat
Vcos?

3. -Beta- decay
Neutron is converted into a proton and an electron is emitted
?=4L/n
V=???
F=Gm1m2/r^2

4. magnetic field is created by loop wire - What is magnetic field at center of loop
Voltage
M1v1=m2v2
Beta=
Sin=1 cos=0

5. formula for impulse (J)
J=Force*Time=mv - mvo=?p
M1v1=m2v2
Surface
Sin=1/2 cos=v3/2

6. intensity of sound
I=P/A
Insulator
None
Diopters

7. diffraction
I=?q/?t
Spreading out of light as it passes through a narrow opening
F=1/2(r)
V=IR

8. specific gravity greater than one
M1v1=m2v2
W'=?E=?KE+?U
Substance is more dense then water
F=E*A

9. wave velocity=
Beta=10Log(I/Io)
Increase length increase resistance
???
1/Req=1/R1+1/R2+1/R3 Veq=V1=V2=V3

10. total energy of spring system
Upright image
Fluid resistance to flow
E=1/2k(A^2)
F=Gm1m2/r^2

11. Capacitors in series
?=4L/n
The shortest wavelength
Longitudinal
1/Ceq=1/C1+1/C2+1/C3 Veq=V1+V2+V3

12. electric field and magnetic field are...
Perpendicular to each other
Emf is positive
F/A
Conduction

13. for photoelectric material to liberate an electron
Sin=v3/2 cos=1/2
Photon energy must be greater than work function of the material
2pvL/g
Energy of electrons

14. gravitational force formula
VA=V/time and v1A1=v2A2 (fluids will flow more quickly through narrow passages)
The shortest wavelength
None
F=Gm1m2/r^2

15. energy of a photon is dependent on...
Work/time
F=ma
Frequency
?L=aL?T

16. type of heat transfer involving the physical motion of heated material
N1>n2
F=E*A
Pressure to move - voltage when no charge is moving between 2 terminals
Convection

17. threshold frequency (photoelectric effect)
Vbulk modulus
Minimum frequency of light that will cause emission of an electron
None
W=mg=?Vg

18. work function
U=1/2QV=1/2CV^2=1/2Q^2/C
I=?q/?t
Energy required to free electron from given metal
Fnet=0 thus Fg=Fs mg=kx

19. 45
The shortest wavelength
Energy gained by particle with charge of e when moved through one volt
Sin=v2/2 cos=v2/2
C=Q/V

20. thermal expansion of a solid
Emf is positive
Voltage
?L=aL?T
Mass number

21. power dissipated by resistor (3 ways)
Vbulk modulus
373K 100
F=nv/2L
P=i^2R=V^2/R=IV

22. center of curvature is...
N1>n2
E*r
2 times the focal distance
V=ED

23. snells law
3a=Beta
Hydrostatics
F=nv/2L
Nsin?incident=nsin?refraction

24. What is an electron volt (eV)
Neutron is converted into a proton and an electron is emitted
A Calorie is a nutritional term equal to 1000 calories
Energy gained by particle with charge of e when moved through one volt
?=2L/n

25. electromotive force
4 Hz
Sin=v3/2 cos=1/2
Incident light is used to free electrons from a metal
Pressure to move - voltage when no charge is moving between 2 terminals

26. atoms atomic number represents
Number of protons in nucleus
Cohesion
Nsin?incident=nsin?refraction
20 Hz to 20 -000 Hz

27. capacitors in parallel
Converted to extra kinetic energy of the emitted electron
Energy required to free electron from given metal
2
Ceq=C1+C2+C3 Veq=V1=V2=V3

28. equation for kinetic friction
Sin=v2/2 cos=v2/2
Moving charge
???
Fk=

29. when unlike charges move away from each other - U of the system
Increases
Charge/area
Real inverted
Coulomb=amphere*sec

30. plane mirrors create What type of image
Real image
Spreading out of light as it passes through a narrow opening
Virtual
?=m/v kg/m^3 g/ml g/cm^3

31. equation for static friction
3
E=Pt
Fs=
Virtual

32. What does atoms atomic weight represent
Weighted average of the masses of the element
?L=aL?T
Convection
Mass number

33. buoyant force is due to...
Force a molecule of liquid feels toward molecules of some other substance
The liquid itself not the object
Weighted average of the masses of the element
P=IA

34. beat frequencies for two frequencies differing by 4 Hz
4 Hz
Y=(F/A)/(?L/L) stress over strain
Buoyant force equals blocks weight
Charge/area

35. find energy in circuit
E=Pt
Yield strength
W=qv
V=kQ/r

36. a virtual image has what kind of image distance
Kg*m/s^2
Negative
A=v^2/r
J=Force*Time=mv - mvo=?p

37. resistance in parallel
V=kq/r
Difference between the absolute and atm pressure Pg=P- Patm
1/Req=1/R1+1/R2+1/R3 Veq=V1=V2=V3
E=Pt

38. electric flux
F=E*A
Vbulk modulus
EV
Beta=

39. magnetic force
Energy of electrons
Virtual upright
F=qvBetasin?
Force applied parallel to objects surface

40. power of sound wave
K+U=constant
Charge remains constant
P=IA
Vbulk modulus

41. units for newtons
Vsin?
Virtual upright
Real inverted
Kg*m/s^2

42. Formula for centripetal force
F=mv^2/r
Force a molecule of liquid feels toward molecules of some other substance
Buoyant force equals blocks weight
1/f=1/o+ 1/i

43. temperature and resistors
Current*voltage
Higher temperature increases resistance
Inverted image
Will never decrease capacitance

44. excess energy of a photon is...
Work/time
Converted to extra kinetic energy of the emitted electron
None
U=1/2QV=1/2CV^2=1/2Q^2/C

45. (-) magnification signifies
Solute whose solution is conductive
Convection
Inverted image
(Vo+v)/2

46. electrical power
Force a molecule of liquid feels toward the other molecules of the liquid
F=c/?
P=IV
F=- F

47. horizontal velocity of projectile
0K -273
Sin=v3/2 cos=1/2
Vcos?
?x=1/2(v+vo)t

48. lever arm is halved what happens to torque
It is halved
Work/time
B=(F/A)/(?V/V)
P1+?gy of 1 + 1/2?v^2 of 1=P2+?gy of 2 + 1/2?v^2 of 2

49. mirror image is on same side as object
W=qv
Fk=
Real image
F=c/?

50. meaning of Bernouili's equation
As speed of fluid increases pressure and potential energy decrease
?x=1/2(v+vo)t
Force and acceleration
When velocity of the fluid exceeds critical velocity