EXTRA PSYCH

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1. magnitude of the gravitational force
Gm1m2/r^2
2. frictional force
uN
3. first equation of kinematics
x=x+v0t+1/2at^2
4. second equation of kinematic
v=v0+at
5. third equation of kinematics
v^2=v^2-2a(dx)
6. Work equation
W=PdV
7. Power equation
P=W/t=dE/t
8. Net work equation
Wnet=dKE
Fout/Fin

ratio of magnitude of force exerted on object by a simple machine to the force actually applied on the simple machine
10. efficiency equation
Wout/Win

11. Fahrenheit--> Celsius
(9/5)C+32
12. thermal expansion
dL=alphaLdT

dV=betaVdT
13. First law of thermodynamics
dU=Q-W
14. When will dU have a positive value? negative value?
- increasing temperature

- decreasing temperature
15. When will Q have a positive value? negative value?
Heat flows into system

Heat flows out of system
16. When will Work have a positive value? negative value?
Work is done by the system (expansion)

work is done on the system (compression)
17. equation that relates the heat gained or lost by an object and the change in temperature of that object
q=mcdT
18. When heat energy is added to or removed from a system that is experiencing a phase change, the amount of heat that is added or removed cannot be calculated with the equation q=mcdT because there is no temperature change during a phase change. Instead, the following equation is used:
q=mL
19. How do you use q=mL and q=mcdT in conjunction with one another?
• 1) get the substance to its melting point with q=mL
• 2) Once at tempearture, use q=mL to get everythign melted (temperature will not change)
20. Isothermal process (equation)
Q=dW
dU=-W
22. Isobaric process
no special forms
23. isolumetric
dU=Q
24. Pressure equation
P=F/A
25. 1 g/cm^3= ?
1000 kg/m^3
26. Specific gravity
desity of a fluid that is often compared to that of pure water at 1 atm and 4 degrees Celsius

SG=density/(1000 kg/m3)
27. absolute hydrostatic pressure
total pressure exerted on an object that is submerged

P=Po+ (density)gz

Po is the incident or ambient pressure (pressure at the surface)
28. Gauge pressure
difference between the absolute pressure inside the tire and the atmospheric pressure outside the tire

Pgauge=P-Patm=(Po+(rho)gz)-Patm
29. Pascal's principle
a change in pressre will be transmitted undiminished to very portion f the fluid and tot eh walls of the vesssel
30. Pressure acording to Pascal's principle
P=F/A=F/A
31. Volume of fluid displaced by one piston and its relationship to the second piston
V=A1d=A2d2
32. equation for work at constant pressure and volume change
33. Buoyant force
rho(fluid)V(fluid displaced)g
34. How can one determine how much of a floating object lies below the surface?
Make comparisons of density or specific gravitty.

An object will float, no matter what it is made of and no matter hw much mass it hs, if the average density is less than or equal to the density of the fluid into which it is placed

ex: specific gravity of an object is 0.92, so its specific gravity is 0.92 and it will be submerged 92%
35. What is the relationship between the pressure graidient and the radius when dealing with laminar flow in a pipe?
relationship is inverse exponential to the fourth power
36. Linear speed equation (fluid)
v1A1=v2A2
37. Bernoulli's equation
P1+(1/2ρv^2)+ρgh=P2+(1/2ρv^2)+ρgh2
38. dynamic pressure equation
1/2ρv^2
39. electric field
E=Fe/q=Kq/r2
40. electrical potential energy
U=kQq/r
41. Electrical potential
V=kq/r
42. potential difference (voltage)
dV=Vb-Va=Wab/q
43. Finding electric dipole
V=kq/r1-kq/r2
44. diagmagnetic materials
made of atoms with no unpaired electrons
45. paramagment
have unpaired electrons, but these materials are oriented so that material creates no magnetic field
46. ferromagnetic
unpaired; magnetic dipoles are normally oriented
47. Magnetic field equation for a straight current carrying wire
u0I/2pir
48. Magnetic field equation for a circular current carrying wire
u0I/2r
49. magnetic force equation on
1) moving charge
2) current carrying wire
• F=qvBsin(theta)
• F= ILBsin(theta)
50. definition of current
flow of positive charges

(in chemistry, it is the flow of electrons)
51. current equation
I=Q/dt
52. equation for distance
R=rhoL/A
53. Relationship between resistance and:

1) length
2) area
• 1) increases with increasing length
• 2) decreases with increasing area
54. Ohm's law
V=IR
55. Measuring power as a relation of circuits
P=IV=I^2R=V^2/R
56. capacitance equation
C=Q/V
57. electric field between parallel plate capacitors
E=V/d
58. relationship between capacitance and
1) area
2) distance between the plates
• 1) increases with area
• 2) decreases with increasing distance of plates
59. potential energy stored in a capacityor
U=1/2CV2
60. ammeters
measure current

zero resistance
61. voltmeter
requires an active circuit

measures voltage drop across two points

infinity resistance
62. transverse waves
those in which the direction of the oscillation is perpendicular to propagation of wave

electromagnetic waves; string fixed in place
63. longitudinal waves
ones in which the particles of the wave oscillate parallel to the direction of propagation; ex: slinky?
64. angular frequency
ω=2pif
65. amplitude of a resonating system
it is at its max
66. amplitue of a forced oscillation
the amplitude s increasing
67. speed of sound
v=(B/density)^.5
68. Doppler equation
f'=f
69. Intensity
I=P/A
70. sound level
Beta=10log(I/Io), where Io is 10^-12
71. Snell's law
n=c/v where c is the speed of light in a vacuum and n is the index of refraction

n1sintheta1=n2sintheta2
72. total internal reflection
thetac=sin^-1(n2/n1)
73. Power of a lens
P=1/f
74. slit lens system
asintheta=n(wavelength)
75. multiple slits
dsintheta=(n+1/2)wavelength
76. kinetic energy of ejected electrons
Kmax=hf-W

W=hfT
77. equivalence of matter and energy
E=mc^2
78. alpha decay
79. Beta decay
emission of an electron or a positron
80. Beta- decay
a neutron is converted to a proton and a B- particle

atomic number will be one higher, but mass number will not chagne
81. Beta+ decay
a proton is converted into a neutron; the atomic number is one lower but the mass number will not chagne
82. Gamma decay
no charge ; lower the energy of the parent nucleus
83. electron capture
atomic number is one less than the original but the mass number remains the same
84. exponential decay
dn/dt=-λ*n

n= number of radioactive nuclei that have ot yet decayed in a sampe

λ is the decay constant
85. exponential decay equation two
n=n0e^(-λt)

λ=0.693/T(1/2)
86. sin30
1/2
87. sin45
1.414/2
88. sin60
1.73/2
89. sin90
1
90. sin180
0
91. value of the square root of two
1.414
92. value of the square root of three
1.732
93. cos0
1
94. cos30
1.73/2
95. cos45
1.414/2
96. cos60
1/2
97. cos90
0
98. cos180
-1
99. tan0
0
100. tan30
1.732/3
101. tan45
1
102. tan60
1.732
103. tan90
undefined
104. tan180
0
 Author: DesLee26 ID: 302807 Card Set: EXTRA PSYCH Updated: 2015-05-16 12:48:01 Tags: MCAT Folders: MCAT Description: MCAT Show Answers: