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MCAT Physics JBrosch

TermDefinition
Ohm's Law V= IR
Current I= Q/t (movement of positive charge; created by voltage)
Power in a circuit = ? I^2R = IV = (V^2)/R = Work/time
Work for charges? - change in V * q
Voltage? Change in Potential; creates current
Potential Voltage? kq/r
Work/ Energy? W = change in KE = NEGATIVE change in PE (Joules)
Electric Force? kqQ/(r^2) OR qE (just add extra q to numerator)
Electric Field? kq/(r^2) OR F/q (divide force by q to cancel out extra q in numerator)
Work of Electric Field? Fd = qEd
Resistance rho (L/A)
Capacitance permittivity of free space (A/d)
Potential across the capacitor U = (q^2)/2C
Electric field inside conductor Zero
Coulomb 9 x 10^9 (Nm^2)/(C^2)
2 pi rads 360 degrees
1 rad 57.3 degrees
An induced current... OPPOSES the magnetic field
Centripetal acceleration (v^2)/r = omega^2*r
Parallel acceleration (rotational) alpha * r
Escape velocity (2gr)^(1/2)
Work (rotational) torque * theta
Force (rotational) torque/ r
Torque F*r*sin(theta) OR F*"lever arm"
Inertia resistance to movement
momentum mass*velocity
change in momentum impulse = F*(change in time)
KE mv^2/2
PE (spring); Hooke's Law kx^2/2
Force of spring -kx
frequency 1/T
T pendulum 2pi(L/g)^1/2
T spring 2pi(m/k)^1/2
Stress force/ area
Strain change in length/ length
F buoyant V fluid * density fluid* g
Doppler F apparent = original V sound/ (V sound - V source)
Created by: 563471636