# Shared Flashcard Set

## Details

MCAT - Physics
MCAT - Physics
10
Physics
01/03/2009

Term
 Equations of linear motion Total horizontal distance traveled by a projectile=
Definition
 v=vo+at(xf-xo)=vot+1/2at2[image]v2=vo2+2a(xf-xo)  x=voxt
Term
 Torque= ac= Fc=  For a planet orbiting the star, the Fc=
Definition
 Torque=rFsin(angle) ac=v2/r Fc=ma=mv2/r  For a planet orbiting the star, the Fc= the gravitational force.
Term
 As the angle of incline increases, what happens to the normal force? Diameter= Circumference=
Definition
 As the angle of incline increases, the normal force decreases. Diameter=2[image]rCircumference=d[image]
Term
 Work= When w=0 for a nonconservative force, the total mechanical energy=...but when friction or air resistance is present, mechanical energy...
Definition
 Work=Fdcos(angle)(so if the angle>90, work<0)  When w=0 for a nonconservative force, the total mechanical energy=ΔKE+ΔPE...but when friction or air resistance is present, mechanical energy is NOT conserved.
Term
 Efficiency= Momentum=  Impulse=
Definition
 Efficiency=Wout=weightXdistance                             Win    effortXdistance Momentum=p=mv  Impulse=J=Ft=mv-mvo=Δp
Term
 When the net impulse of an external force acting on a system is zero, what happens to the total momentum? Center of mass=  When is the center of mass and center of gravity equal?
Definition
 When the net impulse of an external force acting on a system is zero, the total momentum is constant. (J=Δp) Center of mass=x=m1x1+m2x2                                               m1+m2 Center of mass and center of gravity are equal as long as gravity is constant.
Term
 Identify the following for mass-spring systems and simple pendulum systems                          Mass-Spring      Simple Pendulumk (force constant):T (period):ω (angular frequency):f (frequency):K (kinetic energy):   Kmax:U (potential energy):   Umax:Max acceleration at:
Definition
 Mass-Spring    Simple Pendulumk=                      k                   mg/LT=                 2Π√(m/k)     2Π√(L/g)ω=                  √(k/m)           √(g/L)f=                         1/T or ω/2Π K=                            1/2mv2  Kmax=                x=0                 θ=0U=                    1/2kx2           mghUmax=                x=±max      θ=±maxMax a at=          x=±max        θ=±max
Term
 How does an electron jump from a lower energy state to a higher energy state (n=1 to n=2)?  Explain the process of fluorescence.
Definition
 In order for an electron to jump from a lower energy to a higher energy state, the electron must absorb a photon with exactly the right frequency.The energy gained must=the energy gap b/w the two energy states.   Fluorescence:A UV photon is absorbed by an electron causing it to gain energy and jump to a higher energy state. The electron loses a little bit of energy when transferring from the excited state to a lesser excited state.While the electron is finally returning to its ground state, it emits a photon w/in the visible light spectrum.
Term
 Explain alpha decay. Explain beta decay.   Explain gamma decay.
Definition
 Alpha Decay is the decay involving emission of an alpha particle (42He).AzX -> A-4z-2X' + α Two different types of beta decay:1.Beta-Minus Decay= emission of an β- particle (an electron) AzX -> Az+1X' + β-2.Beta-Plus Decay= emission of a β+ particle (a positron)AzX -> Az-1X' + β+  Gamm decay is decay that involves the emission of gamma particles which are high-energy photons. **so the daughter nucleus has less energy than the parent nucleus**Gamma decay does not change the identity of the isotope.AzX* -> AzX' + γ
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