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Physics
MCAT Study Cards
| Term | Definition |
|---|---|
| translational motion displacement | x0 + v0t + 1/2at^2 |
| translational motion velocity (w/0 time) | (v0)^2 +2ax |
| translational motion velocity (w/o displacement) | v0 +at |
| max frictional force | uN where N is the normal force |
| force of uniform circular motion | ma = mv^2 /r |
| acceleration of uniform circular motion | v^2 /r |
| Kinematics, work | Fdcos(theta) |
| Kinematics, power | (Wf - Wi)/ (tf - ti) |
| Mechanical Energy | KE + PE |
| weight | mg |
| force of gravity and inclined plane | mgsin(theta) |
| momentum | p = mv |
| Potential Energy | -W = mgh |
| Which is greater: static or kinetic friction? | static friction is always greater |
| is gravity a conservative force? | yes |
| is friction a conservative force? | no |
| Spring, force | -kx |
| Spring, work | kx^2 /2 |
| Newton units | kgm/s^2 |
| Joules units | kgm^2 /s^2 |
| Hertz units | s^-1 |
| Ohm units | W/A^2 |
| Watt units | J/s |
| Volt units | W/A |
| Resistors in series | R1 + R2 + .... |
| Resistors in parallel | R1*R2*..../R1 + R2 + .... |
| Torque | rFsin(theta) = rmgsin(theta) |
| Current, I | Q/t |
| Continuity of fluids | A1*v1 = A2 * v2 |
| Thermodynamics, heat | mc(Tf - Ti) |
| Snell's Law | n1*sin(theta1) = n2*sin(theta2) |
| Index of refraction | c/speed of light in medium |
| What is the angle of incidence equivalent to? | angle of reflection |
| Voltage | = IR, remember V, I, R triangle |
| Pressure | Force/Area |
| Force of buoyancy | Vpg = mg, where p is density |
| Speed | sqrt(2gh) |
| Optics, Power | 1/i + 1/o = 1/f |
| Optics, o | object distance from mirror |
| Optics, i | image distance from mirror |
| Optics, f | focal length mirror |
| focal length positive when? | converging lens or concave mirror |
| focal length negative when? | diverging lens or convex mirror |
| Gibbs free energy biochemistry | change H - T(change in S) |
| Gibbs free energy general chemistry | -RTln(Keq) |
| Capacitors in series | 1/C1 + 1/C2 +.... |
| Capacitors in parallel | C1 + C2 + .... |
| Bernoulli's equation fluids | P + rho(gh) + 1/2(rho)v^2 |
| pendulum, frequency | 1/2pi *sqrt(g/L) or ~sqrt(k/m) |
| pendulum, period | 2pi * sqrt(L/g) |
| Doppler Effect | f' = fs(v +/- vo)/(v +/- vs) where vs is the velocity of source vo is velocity of the observer fs is real frequency f' apparent frequency |
| Positive charges move to regions of? | lower potential |
| Negative charges move to regions of? | higher potential |
| Energy of photon emitted or absorbed | abs(13.6eV*[(1/nf^2) - (1/ni^2)] = hf |
| Heisenberg Uncertainty principle | deltax*deltap > h/2pi |
| Kirchoff's Law for Current (I) | Sum of I = 0 at a junction |
| Kirchoff's Law for Voltage | Sum of V = 0 at a loop |
| Energy btwn two parallel plates | V/d |
| Force of an electrostatics | F=kq1*q2/r^2 |
| Force of a magnetic field | abs(q)vBsin(theta) |
| First Law of Thermodynamics | Uf-Ui = Q-W |
| adiabatic process | Q=0, no heat exchanged, E=-W |
| isochoric process | W=0, no volume exchanged |
| isothermal process | Q=W |
| Capacitance | epsilon(A/d) where epsilon = 1.0x10^-12 |
| Energy stored by capacitor | 1/2(CV)^2 |
| total momentum | p1 + p2 + ... = pf |
| Work | Fdcos(theta) |
| Hydrostatic pressure | P = density(gravity)(height) |
| Boltzmann's constant | Energy of an individual particle level with temperature. k=R/Na where R is the ideal gas constant, and N is avogadro's constant |
| sin(0) | 0 |
| sin(30) | 1/2 |
| sin(45) | 1/sqrt(2) or .70 |
| sin(60) | sqrt(3)/2 or .85 |
| sin(90) | 1 |
| cos(0) | 1 |
| cos(30) | sqrt(3)/2 or .85 |
| cos(45) | 1/sqrt(2) or .70 |
| cos(60) | 1/2 |
| cos(90) | 0 |
| ideal gas law assumption | namely, that gas molecules have negligible volume and that intermolecular interactions are negligible |
| real gases differ from ideal gases at | high pressure and low temperature |
| resistivity | p=RA/l R is the total resistance A is the cross sectional area l is the length of the material |
| metallic conduction | involves the flow of electrons, decreases with increases in temperature, there is no transfer of matter |
| electrolytic conduction | involves the flow of ions, involves a chemical reaction, increases with increasing temperature, there is a transfer of matter |
| Snell's Law | n1 sin θ1 = n2 sin θ2 |
| Dielectrics | nonconducting material placed between two capacitors. ALWAYS increases capacitance. C=kC, where k>1 |
| Diffraction | dsinθ = mλ |
| Resistivity proportionality | Amplitude^2 Temperature directly proportional |
| Archimedes principle of density | Wair/(Wair-Wwater) |
| Electric field lines | proceed from positive to negative regions |
| Real images | always inverted |
| Virtual images | always upright |
| Poiseuille Flow Resistance to Flow | R=8nL/(p*r^4) |
| Poiseuille Flow Volume Flow rate | pi*(change P)(r^4)/8nL |
| Boyle's Law | PV= constant |
| Charles' Law | V/T = constant |
| Avogadro's Law | V/n = constant |
| Power | W/t |
| Pascal's Law | F/A = constant |
| surface tension | due to attraction of molecules in the solvent |
| Electric field lines | out of positive charges, into negative charges |
Created by:
missmartian
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