1. Physical Quantities

2. Instructions In the slides that follow, a definition or description of a physical quantity is given. You must name the quantity and state it’s SI units.

3. This tells how much “stuff” an object is made of. It also provides a measure of an object’s inertia, and determines its gravitational interactions. Mass kg

4. The force per unit charge that would be experienced by an object at a particular location. Electric Field Newtons per Coulomb OR Volts per meter

5. The force per unit area exerted on a surface Pressure Pascals

6. The rate at which charge flows in a wire or circuit Electric Current Amperes

7. A push or a pullForce Newtons

8. How tightly matter is packed. Mass per unit volume. Density kg/m 3, g/mL

9. The amount of charge per volt stored by a device. Capacitance Farads

10. The amount of energy per unit charge Electric potential (or voltage) Volts

11. Vector quantity equal to the product of an object’s mass and velocity. Momentum Kg-m/s or N-s

12. A force acting at a distance that tends to cause a rotation. Torque Newton-meters

13. The amount of time it takes something to complete one full cycle. Period seconds

14. Ratio of the speed of light in vacuum to the speed of light in a transparent medium. It determines the refractive (bending) properties of the material. Index of refraction No units

15. Property that measures how difficult it is for charge to flow in a circuit. Resistance Ohms

16. The number of magnetic field lines that pass through a surface. Magnetic Flux Webers (or T-m2)

17. The rate at which an object’s velocity is changing. Acceleration m/s2

18. The number of oscillations per unit time. Frequency Hertz

19. A force that acts through a distance. One of the ways of adding or removing energy from an object. Work Joules

20. The magnitude of an object’s displacement. Distance Meters

21. Product of a force and the duration of time it is applied. It results in a change of momentum Impulse N-s (or kg m/s)

22. A vector field that can result in a force if a charged object moves through it. Magnetic Field Tesla

23. Property of a particle that determines its electrical interactions Electric charge Coulombs

24. Section II -- Formulas In this section the name or description of a formula is given. You must be able to state the equation and explain what is represented by each letter in the formula.

25. Newton’s Second Law Fnet=ma or  F=ma

26. Coulomb’s LawFelec=kq1q2/r2

27. Faraday’s Law EMF=-N  /  t

28. Magnetic field due to a long straight wire B=   I/2  r

29. Ohm’s Law  V=IR

30. Calculate power in an electric circuit P=IV or P=I 2 R

31. Variation of resistance with temperature R=R o (1+  T)

32. Force acting a current carrying wire in a magnetic field. F=BILsin 

33. Bernoulli’s Law P+  gh+1/2  v 2 =constant

34. Force acting on a charge in an electric field F=qE

35. Find the charge stored on a capacitor C=Q/  V

36. How resistance depends on the geometry of a conductor R=  L/A

37. Electromotive force created by moving a wire through a magnetic field.  V=EMF=BLv

38. Snell’s Law n 1 sin  1 =n 2 sin  2

39. Double slit interference dsin  =n Y n =n L/d

40. Kinetic friction F f =  k N

41. Kinematics equation that leaves out time v 2 =v o 2 +2a  x

42. First law of thermodynamics  U=Q-W (where W is the work done BY the gas)

43. Universal law of gravity F g =GM 1 M 2 /r 2

44. Equivalence of mass and energy (used in pair production, pair annihilation and nuclear binding energies). E=mc 2

45. Capacitors in series1/Ceq=1/C1+1/C2…

46. How capacitance of a parallel plate capacitor depends on geometry. C=  o A/d

47. Electric field due to a point charge E=kq/r 2

48. Force acting on a charge moving through a magnetic field. F=qvBsin 

49. Impulse momentum theorem F net  t=  p

50. Wave equation v= f

51. Lens-mirror formula1/f=1/do + 1/di

52. Parallel component of an object’s weight on an inclined plane F parallel =mgsin 

53. Gravitational potential energy on earth (or in a uniform gravity field) Ug=mgh

54. Spring forceFspring=-kx

55. Energy of a photonE=hf

56. Energy levels of hydrogen atom En= -13.6 eV/n 2

57. Overall intensity of a blackbody P/A=  T 4

58. Photoelectric effect q  V=hf-  KE max =hc/ - 

59. Electric potential in the vicinity of a point charge V=kq/r

60. Energy of a charge accelerated through a potential difference  E=q  V

61. Resistors in seriesReq=R1+R2…

62. Current along parallel branches of an electric circuit I1+I2+I3=Itotal

63. How to calculate energy used by a device that is in operation for a certain amount of time. Energy=Power x time

64. Kepler’s Third LawT2/r3=constant

65. Equation of continuityA 1 v 1 =A 2 v 2

66. Spring potential energy Uspring=1/2 kx 2

67. Gravitational potential energy of two spherical masses separated by a distance. Ug= -Gm 1 m 2 /r

68. Compton scattering  =he/mc(1-cos  )