EXTRA PSYCH

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DesLee26
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302807
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EXTRA PSYCH
Updated:
2015-05-16 08:48:01
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MCAT
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MCAT
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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
  9. mechanical advantage
    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

    (load)(load distance)/ (effort)(effort distance)
  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
  21. adiabatic
    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
    W=F/A(Ad)=F/A(Ad)= F1d1=F2d2
  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

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