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MCAT Physics

Terms

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Ohm's Law
V=IR
Voltage for a paralell circuit
Vt=V1=V2
Voltage for a series circuit
Vt=V1+V2+Vn...
Resistance in a parallel circuit
1/Rt=1/R1+1/R2
Resistance in a series circuit
Rt=R1+R2
Current in a series circuit
It=I1=I2
Potential Difference
V=W/Q

work/unit charge
Electric Field
E=F/Q

force/unit charge
Coulomb's law
F=KQ1Q2/rsquared
Index of refraction
n=sintheta1/sintheta2
Focal length of a spherical mirror
F=R/2
Huygen's Principle
each pt. on a wave front may be regarded as a new source of disturbance
Telescope magnification
m=fo/fe
Magnification
m=id/od
Lens equation
1/id+1/od=1/f
Snell's Law
n1sintheta1=n2sintheta2
Liquid Pressure
p=hdg
Solid Expands
∆L=Lc∆T
Work eq. for a spring
W=1/2Kxsquared
Hooke's Law
F=-Kx
Momentum
P=mv
Power
P=W/t=Fd/t
Coefficient of Friction sliding
mew=Ff/N
Kinetic Energy
Ke=1/2mvsquared
Potential Energy
Pe=mgh
Work
W=Fd
force times distance moved
Newton's Law of Gravitation
F=Gm1m2/rsquared
Average Velocity
V=(Vi+Vf)/2
Final Velocity
Vf=Vi+at
Vf=(visquared+2as)to the 1/2
Distance
S=vi+1/2atsquared
Acceleration
a=(V2-V1)/(t2-t1)
Newton's Law of Gravitation
(in words)
2 bj. attract eachother w/ a force that is portional to the product of their masses and INVERSELY proprtional to the square of the distance between them
Centripetal force
inward force that must be applied to keep a body moving in a circle
Centripetal Acceleration
a=vsquared/r
Archimede's principle
loss in weight of an obj. immersed in a fluid equal the weight of fluid displaced
Bernoulli's Principle
greater the velocity of a fluid the smaller the pressure
Longitudinal wave
vibrationjs parallel to direction of propogation
-sound waves
Doppler effect
when there is relative motion btwn a sourceof a wave and an observer, the frequency of vibrations received by the observer increases if the source and observer approach one another and decreses when they seperate
Law of reflection
when a wave is reflected the angle o fincidence equals the angle of reflection
Focal length
f=R/2
Refraction
bending of a wave on going into a second medium
Critical angle
limiting angle of incidence in the optically denser medium that results in an angle of refraction of Ëš90
Polarized light
light whose direction of vibration has been restricted into one plan of vibration
Virtual image
image formed by the eye and brain which cannot be projected on a screen
Magnetic Field
region where a megnetic influence can be detected as a force on a magnet
Electromegnetic Strength
1)# of trns in the coils of a solenoid
2)nature of the core
3)current through the core

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