# PH105-106 mcat review

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 Author: ccraigr ID: 197206 Filename: PH105-106 mcat review Updated: 2013-02-02 21:01:05 Tags: General Physics Folders: Description: Basic overview of General Physics Principles Show Answers:

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1. Average Velocity
& Units

m/s
2. Average Acceleration
& Units

m/s2
3. Velocity at time t with acceleration a:
Units?

m/s
4. Distance at time t with acceleration a:
Units?

meters
5. Find velocity at a point d with acceleration a:
6. distance at time t without acceleration a:
7. Average Velocity:
8. On an xy axis with a velocity with angle between velocity and the x axis, What is the X component of the velocity? What is the Y component of velocity?

9. Common Trigonometric Functions:

sin 0
cos 0
tan 0
• sin 0 = 0
• cos 0 = 1
• tan 0 = 0
10. sin15
cos15
tan15
• sin15=0.259
• cos15=0.966
• tan15=0.268
11. sin30
cos30
tan30
• sin30=0.5
• cos30=0.866
• tan30=0.577
12. sin45
cos45
tan45
• sin45=0.707
• cos45=0.707
• tan45=1
13. sin60
cos60
tan60
• sin60=0.866
• cos60=0.5
• tan60=1.73
14. sin75
cos75
tan75
• sin75=0.966
• cos75=0.259
• tan75=3.73
15. sin90
cos90
tan90
• sin90=1
• cos90=0
• tan90= not possible.
16. Define momentum:
What are it's units?

kg m/s or N s
17. Define Impulse:
• But is more useful as: Change in Momentum
18. Define Work:
What are the Units?
• where theta is the angle between F and d
• Its units are Joules (N m)
19. Define Power
What are the units?

It is Joules/s or Watts.
20. Define Kinetic Energy:

the Joule
21. Define PotentialG Energy

The Joule
22. When is total mechanical energy conserved?
When the sum of PE and KE is constant
23. What is the Work Energy Theorum?
• All work performed is equal to the Change in Kinetic Energy:
24. What is the Conservation of Energy?
• When there are not any nonconservitive forces acting on a system, the total mechanical energy remains constant.
• Friction is one example of a nonconserved force.
25. Which of the following are Scalar?
Work?
Energy?
Momentum?
Power?
Impulse?
Distance?
Velocity?
Acceleration?
Force?
Time?
• Work,
• Power,
• Energy,
• Time,
• Distance.
26. Which of the following are Vectors?
Work?
Energy?
Momentum?
Power?
Impulse?
Distance?
Velocity?
Acceleration?
Force?
Time?
• Momentum,
• Impulse,
• Velocity,
• Acceleration,
• Force.
27. What is characteristic of Elastic collisions?
KE is conserved
28. What is Characteristic of inelastic Collisions?
KE is not conserved
29. What is Characteristic of perfectly inelastic collisions?
The objects stick together.
30. What is Newtons 1st Law?
The law of inertia; bodies in motion or rest tend to stay at motion or rest, unless acted on by net force.
31. What is Newtons 2nd Law?
• Net force and net acceleration are in the same direction.
32. What is Newtons 3rd Law?
• The law of force pairs. Equal and opposite force.
33. What is the Law of gravitation?
34. Is mass or weight a vector?
Weight is a vector. W=mg and is the earth's gravitational pull on the mass. the direction is towards the earth.
35. Is mass scalar or a vector?
It is scalar. It is only a measure of inertia.
36. What is Fc?
The force necessary to keep an object moving in circular motion.
• 1 radian is the portion of the circumference that is equal in length to the radius.

38. Define angular velocity
39. Define angular acceleration:
40. How is linear velocity related to angular velocity?
v
41. How is linear acceleration related to rotational acceleration?
42. given the frequency, define angular velocity:
43. Define period T
44. What must be true or constant to correctly apply the kinematic equations?
a or must be constant.
45. Find angular velocity at time t with angular acceleration given.
46. what is the angular velocity given the number of rotations at a given angular acceleration?
47. find find the number of radians traversed given time and angular acceleration:
48. define average angular velocity:
49. Define torque:
50. What is the relation between torque and moment of inertia?
|
51. Define rotational kinetic energy:
52. In rotational kinematics what does I play, and how is that different from linear kinematics?
I is the moment of inertia, and it replaces mass. It depends on both the scalar quantity of mass and the physical distribution of the mass.
53. Define Angular momentum:
54. Define Newton's second law in terms of angular momentum:
55. Define center of mass:
• Location of balance on linear object.
56. Define density:
what are the units/

kg/m3
57. Define specific gravity:

no units
58. define weight:
59. Is pressure scalar or a vector
Scalar
60. Define Pressure:
What are the Units?

N/m2=1Pa
61. What is standard atmospheric Pressure?
62. Define gauge pressure:
63. Define absolute pressure:

• where P0 is the surface pressure.
• Must be a static fluid.
64. Define Buoyant Force for a given fluid:
• upward only
65. Define flow rate:

m3/s
66. Define the flow of a fluid through varying diameters:
67. Define Bernoulli's Equation:
P
68. For an Enclosed Fluid, Define Pascal's principle:
69. How does Pascal's equation relate to work?
70. Define Coulomb's Law:
What are the Units?

Newtons.
71. For Electrostatics, define the constant k:
72. Define Electric Field:

N/C or V/m
73. What is the difference between equipotential lines and field lines?
• Equipotential are all at the same potential and lie perpendicular to the field lines.
• Field lines Go from High potential to low Potential, and radiate from Charges.
74. Define Electric Potential:

Volt=V=J/C
75. Define the potential difference between two charged plates at distance d between them:
76. Define Voltage:
77. Define Electrical Potential Energy:

• notice that the radius is not squared!
78. Does work done by the electrostatic force result in an increase or decrease in Potential Energy?
Decrease
79. Does work done against the electrostatic force result in an increase or decrease in Potential Energy?
Increase.
80. Define Current:

Flow of electric charge. Amp=C/s
81. Define Ohm's Law:
• V=IR
• Where V is voltage,
• I is Current,
• R is Resistance.
82. How is resistance affected by temperature?
Resistance increases with increasing temperatures in most conductors.
83. What are the units of Resistance?
R=V/I
84. Define the Power dissipated by a Resistor:
85. What does the Power dissipated by a resistor apply to?
It Can apply to either the whole circuit or to individual resistors.
86. Define Capacitance:
• Capacitance
• Coulombs/V.
87. What is the mathematical principle for capacitors in parallel?
88. What is the mathematical principle for capacitors in series?
89. Define Gauss's Law:
90. Define the dielectric constant:
91. What are Kirchoff's Laws?
• 1. At any junction within a circuit, the sum of current entering must equal the current leaving.
• 2. The sum of voltage sources equals the sum of voltage drops around a closed circuit loop.
92. How do R, I and V add in parallel?
• 1/Req=1/R1+1/R2+1/R3
• I=I1+I2+I3
• V=V1=V2=V3
93. How do R, I and V add in series?
• Req=R1+R2+R3
• I=I1=I2=I3
• V=V1+V2+V3
94. Define Vrms, Irms, and Pavg for Alternating current:

95. What does adding a dielectric do to the Capacitance?
• It increases it:
96. What is a dielectric?
an insulator.
97. Define Tesla T
98. Define Period T:
T=time to complete 1 cycle
99. Define frequency f:
100. What is the angular frequency?
• It is equal to angular velocity, and given in rad.
101. What is Simple Harmonic Motion (SHM)?
It is a periodic motion where the period (T) (and frequency) is independent of the amplitude.
102. What is wavelength?
It is the distance between 2 corresponding points on consecutive pulses. So crest to crest, or trough to trough.
103. What is the Velocity of a wave in a spring?
v
104. What is the speed of a wave given f and wavelength?
105. Do electromagnetic waves need a medium?
NO. light for example.
106. what is the speed of light?
c=3x108m/s
107. What is the wavelength for a string attached at each end?
108. What is the wavelength for an open pipe?
109. What is the wavelength for a closed pipe?
110. How does sound intensity add and subtract?
• Adding 10dB is like multiplying the Intensity by 10.
• Subtracting 10dB is like dividing the Intensity by 10.

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