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50 Cards in this Set
- Front
- Back
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Ohm's Law
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V=IR
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Voltage for a paralell circuit
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Vt=V1=V2
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Voltage for a series circuit
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Vt=V1+V2+Vn...
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Resistance in a parallel circuit
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1/Rt=1/R1+1/R2
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Resistance in a series circuit
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Rt=R1+R2
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Current in a series circuit
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It=I1=I2
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Potential Difference
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V=W/Q
work/unit charge |
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Electric Field
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E=F/Q
force/unit charge |
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Coulomb's law
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F=KQ1Q2/rsquared
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Index of refraction
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n=sintheta1/sintheta2
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Focal length of a spherical mirror
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F=R/2
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Huygen's Principle
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each pt. on a wave front may be regarded as a new source of disturbance
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Telescope magnification
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m=fo/fe
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Magnification
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m=id/od
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Lens equation
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1/id+1/od=1/f
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Snell's Law
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n1sintheta1=n2sintheta2
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Liquid Pressure
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p=hdg
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Solid Expands
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∆L=Lc∆T
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Work eq. for a spring
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W=1/2Kxsquared
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Hooke's Law
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F=-Kx
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Momentum
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P=mv
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Power
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P=W/t=Fd/t
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Coefficient of Friction sliding
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mew=Ff/N
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Kinetic Energy
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Ke=1/2mvsquared
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Potential Energy
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Pe=mgh
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Work
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W=Fd
force times distance moved |
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Newton's Law of Gravitation
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F=Gm1m2/rsquared
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Average Velocity
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V=(Vi+Vf)/2
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Final Velocity
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Vf=Vi+at
Vf=(visquared+2as)to the 1/2 |
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Distance
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S=vi+1/2atsquared
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Distance @ constant v
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S=Vit
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Velocity @ constant a
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Vf=Vi+at
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Acceleration
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a=(V2-V1)/(t2-t1)
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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
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Center of Gravity
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A point in or on the obj. where all the weight is concentrated. If supported only @ this point the obj. will balance
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Centripetal force
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inward force that must be applied to keep a body moving in a circle
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Centripetal Acceleration
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a=vsquared/r
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Archimede's principle
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loss in weight of an obj. immersed in a fluid equal the weight of fluid displaced
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Bernoulli's Principle
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greater the velocity of a fluid the smaller the pressure
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Transverse wave
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vibrations are @ right angles to direction of propogation
-electromagnetic waves |
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Longitudinal wave
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vibrationjs parallel to direction of propogation
-sound waves |
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Doppler effect
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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
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Law of reflection
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when a wave is reflected the angle o fincidence equals the angle of reflection
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Focal length
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f=R/2
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Refraction
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bending of a wave on going into a second medium
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Critical angle
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limiting angle of incidence in the optically denser medium that results in an angle of refraction of ˚90
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Polarized light
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light whose direction of vibration has been restricted into one plan of vibration
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Virtual image
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image formed by the eye and brain which cannot be projected on a screen
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Magnetic Field
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region where a megnetic influence can be detected as a force on a magnet
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Electromegnetic Strength
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1)# of trns in the coils of a solenoid
2)nature of the core 3)current through the core |
