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50 Cards in this Set

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  • Back
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
Distance @ constant v
S=Vit
Velocity @ constant a
Vf=Vi+at
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
Center of Gravity
A point in or on the obj. where all the weight is concentrated. If supported only @ this point the obj. will balance
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
Transverse wave
vibrations are @ right angles to direction of propogation
-electromagnetic waves
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 ˚90
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