Thursday, September 27, 2012

MCAT Physics Equation Lists (Formulas)


MCAT Physics Equation Lists (Formulas)

MCAT Physics Equation Lists (Formulas)

Memorize These!

Translational motion x = x 0 + v 0 t + at2/2 Vƒ = Vo + at
Frictional force max = μ Ν μk < μs
Uniform circular motion Fc = mac = mv2 /r ac= v2 /r
Momentum, Impulse I = F Δt = ΔM M = mv
Work, Power W = F d cosθ P = ΔW/Δt
Energy (conservation) ET = Ek + Ep E = mc2
Spring Force, Work F = -kx W = kx2 /2
Continuity (fluids) A v = const. ρAv = const.
Current and Resistance I = Q/t R = ρL/A
Resistors (series, par.) Req = R1 + R2 . . . 1/ Req = 1/ R1 +1/ R2
Sound dB = 10 log 10 (I/I0 ) beats = Δ f
Kirchoff's Laws Σ= 0 at a junction  ΣΔ= 0 in a loop
Thermodynamics Q = mc Δ T             Q = mL
Torque forces L1 = F1× r1 L2 = F2 × r2
Torque force at EQ ΣFx = 0 and ΣFy = 0

Σ= 0

Refraction sin θ1 )/(sin θ2 ) = v1 /v2 = n2 /n1 = λ1 /λ2 n = c/v

Memorize as Pairs


F = ma


F = qE

Similar Form
F = KG m1 m2 r2 ) F = k q1 q2 r2 )  
V = IR P = IV Paired Use
vav = Δ d / Δ t aav = Δ v / Δ t (avg vel, acc)
v = λ f E = hf (f = 1/T)
Ek = ½mv2   Ep = mgh (kin, pot E)
Ρ = F/A Δ Ρ = ρgΔh (pressure Ρ)
SG = ρ substance / ρ water ρ = 1 g/cm3 = 103 kg/m3 (Spec Grav)
ρ = mass / volume Fb = Vρg = mg (buoyant F)
Irms = Imax / √2 Vrms = Vmax / √2 Root Mean Sq
1/ + 1/ = 1/ f = 2/r = Power magnification = - i/o Optics

Note: Specific gravity (SG) is equivalent to the fraction of the height of a buoyant object below the surface of the fluid.


Don't Memorize, Know How to Use...

Ρ + ρgh + 1/2 ρv2 = constant

Bernouilli's Equation Fluids in Motion
L0 (1 + αΔ ) Linear Expansion Solids, Temp Δ
A0(1 + γΔ ) Area Expansion  

V0(1 + βΔ )

Volume Expansion β = 3 α
fo = fs (V ± vo )/ ( ± vs ) Doppler Effect: when d is decreasing use + vo and - vs  
Ed for a parallel plate capacitor = the distance between the plates  
dF = dq v(B sin α) = I dl(B sin α) Laplace's Law RH rule
1/ Ceq = 1/ C1 + 1/ C2 + 1/ C3 . . . Capacitors in Ser. and Par. Ceq C1 C2 . . .
Potential Energy ( PE ) = = 1/2 QV Work in Electricity = 1/2 CV2
ΔG = ΔH - TΔS Gibbs Free Energy ΔG° = -RTln Keq
     

Atomic Physics


1) alpha (α) particle = 2He4 (helium nucleus);

2) beta (β) particle = -1e0 (an electron);

3) a positron +1e0 (same mass as an electron but opposite charge);

4) gamma (γ) ray = no mass, no charge, just electromagnetic energy;

5) Δ /Δ = rate of decay where Δ = change in mass, Δ = change in time.

6) If the number of half-lifes are known we can calculate the percentage of a pure radioactive sample left after undergoing decay since the fraction remaining = (1/2) n .

Nelectrons = 2 n2 , where Nelectrons designates the number of electrons in shell .

The state of each electron is determined by the four quantum numbers:


  • principal quantum number n determines the number of shells, possible values are: 1 (K), 2 (L), 3 (M), etc...

  • angular momentum quantum number l, determines the subshell, possible values are: 0 (s), 1 (p), 2 (d), 3 (f), n-1, etc...

  • magnetic momentum quantum number ml , possible values are: ± , ... , 0

  • spin quantum number ms ,determines the direction of rotation of the electron, possible values are: ±1/2.

The Basics


Right Triangles

sin θ = opp/hyp

cos θ = adj/hyp tan θ =opp/adj
θ = sin -1 x arcsec θ = sec-1θ r2 = x2 + y2

  • angle θ may be given in radians (R) where 1 revolution = 2πR = 360°

  • estimate square root 3 as 1.7 and root 2 as 1.4

  • cross-sectional area of a tube = area of a circle = πr2 where π can be estimated as 3.14 and is the radius of the circle; circumference = 2πr

Some Units to Memorize



  • Both work and energy are measured in joules where 1 joule (J) = 1 × 1 . {Imperial units: the foot- pound , CGS units: the dyne-centimeter or erg }

  • The SI unit for power is the watt (W) which equals one joule per second (J/s) = volts × amperes .

  • Current is measured in amperes = coulombs/sec. The units of resistance are ohms, symbolized by Ω (omega), where 1 ohm = 1 volt/ampere.

  • The SI unit for pressure is the pascal (1 Pa = 1 N/m2 ). Other units are: 1.00 atm = 1.01 × 105 Pa = 1.01 bar = 760 mmHg = 760 torr.

  • The SI unit for the magnetic induction vector is the tesla where 1 T = 1 N/(A)(m) = 104 gauss.

Wednesday, September 26, 2012

Main Physics Formulas and Constants | TutorState.com

Main Physics Formulas and Constants | TutorState.com




Physics Formulas | TutorState.com

Physics Formulas | TutorState.com


Physics Formulas in Reference Tables of Various Testes and Exams

NYC Regent  Exam

Reference Tables for Physical Setting/PHYSICS, 2006 Edition


AP Exam

Table of Information and Equation Tables for AP Physics Exams

Main Physics Formulas end Constants

Saturday, September 15, 2012

In-Home Tutoring in New York City

In-Home Tutoring in New York City

Tutoring Services in Math, Physics, Chemistry, Computer Science, Statistics: TutorState.com

One-on-one and in small groups (3-5 students).

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  2. Physics and Earth Science: 718-223-0228
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Monday, September 10, 2012

Olympia Education Center

Bad Tutors Waste Your Child's Time and Money


Tips from the Olympia Education Center on finding the right tutor to help your child.

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Nationally, Olympia Education Center received close to 300 complaints against tutoring services in the last 12 months. Most allege parents were dissatisfied with the services offered. They felt their children did not improve with the tutoring program. Other consumers alleged tutoring services continued to bill them after they ended the program.

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Phones

  • Mathematics: 917-318-2427
  • Physics and Earth Science: 718-223-0228
  • Chemistry, Biology, and Environment Science: 646-338-5121

Email: admin@TutorState.com

Brooklyn Learning Center

Olympia Education Center

Brooklyn Learning Center

Regents, SAT, MCAT, and AP Test Preparation

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Phones

  • Mathematics: 917-318-2427
  • Physics and Earth Science: 718-223-0228
  • Chemistry, Biology, and Environment Science: 646-338-5121

Email: admin@TutorState.com

Friday, September 7, 2012

Tutoring Service in Math, Physics, Chemistry, Computer Science, Statistics: 1-718-223-0228 admin@TutorState.com http://TutorState.com/

Tutoring Service in Math, Physics, Chemistry, Computer Science, Statistics: TutorState.com

One-on-one and in small groups (3-5 students).

Email:admin@TutorState.com

Locations of Small-Group-Tutoring Centers:

  1. Brooklyn (16th Ave & 76th St, Brooklyn, NY)
  2. Staten Island

The first small-group-tutoring lesson is free.

To apply for small group tutoring call:
  1. Mathematics: 917-318-2427
  2. Physics and Earth Science: 718-223-0228
  3. Chemistry, Biology, and Environment Science: 646-338-5121

Wednesday, September 5, 2012

Mathematics Help for Students

Mathematics Help for Students

Regents, SAT, MCAT, and AP Test Preparation

Small Groups (5 Students)

Location: 16th Ave & 76th St, Brooklyn, NY

One Lesson: 6 hours, $50.

The first lesson is free.

Lesson structure:

  1. Lecture (2 hours)
  2. Recitation (2 hours)
  3. Test (2 hours)

Subjects:

  • Mathematics (Algebra, Calculus, Geometry, Trigonometry, ...)
  • Physics
  • Earth Science
  • Chemistry
  • Biology
  • Environment Science

Phones

  • Mathematics: 917-318-2427
  • Physics and Earth Science: 718-223-0228
  • Chemistry, Biology, and Environment Science: 646-338-5121

Email: admin@TutorState.com


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