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SAT Subject Test: Physics Formulas

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Ideal gas law
P=mv (?p=m?v)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
1/f= 1/di + 1/do
V=IR

2. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
I=mr²
Voltage=PE/q (remember Joules/Coulomb= volt)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)

3. Magnetic force formula (for particle)?
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Product of each lens's magnification
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)

4. (Full/Final) Velocity formula
Eff= 1- Qc/Qh = 1- Tc/Th
Vfinal= V0 +at
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Induced current will flow opposite direction of magnetic flux.

5. Capacitance formula? (there are two)
Fnet=ma
V= 331 m/s + (.6 m/s°C)Temperature
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
C= Q/V = e0 *A/d

6. Formula for energy levels within any atom?

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7. New/old gas formula?

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8. Beat frequency
Fnet=ma
Beat frequency= |F1-F2|
P=IV=I²R=V² /R = Fd/t= Force*velocity
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

9. Magnification equation
W=qVoltage. (think C* J/C and C's cancel out)
Fb= mass of displaced fluid * gravity
M= -di/do (=-hi/ho)
P=IV=I²R=V² /R = Fd/t= Force*velocity

10. Binding energy explanation
E= V/d
Vstationary obj.= [u+v] / [1 + uv/c²] (where u is velocity of large object - and v is velocity of "thrown" object relative to large object)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
V= 331 m/s + (.6 m/s°C)Temperature

11. Potential Energy formula
KE=1/2mv²
Difference between mass of nucleus and sum of it's constituent nucleons (protons/neutrons ...WHY?) energy lost when atom created. (That energy lost is the same energy it takes to break a nucleus into separate protons and neutrons)
PE=mgh
KEmax= hf-F (= E-F= Energy of a photon - work function)

12. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
1.67*10?²7kg
The volume of the object.
F=GM1M2/r²
W=qVoltage. (think C* J/C and C's cancel out)

13. Sign of focus for convex lens?
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Q=m*L (where L is the latent heat of fusion or vaporization)
Negative - focus behind the lens (= virtual image)
PE=mgh

14. If speed is slow/low - index of refraction is...
Large/high
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
E= V/d
A=v²/ r

15. Total KE formula
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Etotal= E rest + KE= mc² + (Y-1)mc²
V=IR

16. Activity of a radioactive sample formula? (probably don't have to know)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Fnet=ma
?= 4L + 1.6d
Vfinal= V0 +at

17. Formula for diffraction pattern - Anti-node to node (A-N)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
PE=mgh
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
(n-1/2)?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)

18. Heat of fusion/vaporization fromula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Q=m*L (where L is the latent heat of fusion or vaporization)
Vstationary obj.= [u+v] / [1 + uv/c²] (where u is velocity of large object - and v is velocity of "thrown" object relative to large object)
V=IR

19. speed of light
C= 3*108 m/s
V=IR
(n-1/2)?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

20. Newton's second law
Fnet=ma
Vfinal²=V0²+ 2ad
The volume of the object.
Ni sin?i=nrsin?r

21. Formula for magnetic flux?
Threshold frequency=F/h (= work functions/planck's constant)
V=f?
6.6310 ?³4 Js
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)

22. Faraday's law
4.14 10?¹5 eVs
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Vstationary obj.= [u+v] / [1 + uv/c²] (where u is velocity of large object - and v is velocity of "thrown" object relative to large object)

23. Converting Fahrenheit to Celsius
I=mr²
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
F= (9/5)C+ 32
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)

24. deBroglie wavelength explanation
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
(n-1/2)?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Vstationary obj.= [u+v] / [1 + uv/c²] (where u is velocity of large object - and v is velocity of "thrown" object relative to large object)

25. Impulse formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
F= (9/5)C+ 32
F=GM1M2/r²
Etotal= E rest + KE= mc² + (Y-1)mc²

26. Law of refraction
P=IV=I²R=V² /R = Fd/t= Force*velocity
F=ILBsin? (?= angle btw. L and B)
1/f= 1/di + 1/do
Ni sin?i=nrsin?r

27. Conversion factor from atomic mass units to MeV?
F=mv²/ r
931MeV=1amu
Q=m*L (where L is the latent heat of fusion or vaporization)
For every action there is an equal and opposite reaction

28. Distance formula?
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Low
PE=mgh
Distance= velocity * time

29. Magnetic force formula (for wire)?
G= 6.67 * 10?¹¹ Nm²/kg²
Etotal= E rest + KE= mc² + (Y-1)mc²
Length stationary=Length moving/Y
F=ILBsin? (?= angle btw. L and B)

30. Threshold frequency formula?

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31. Kinetic Energy formula
KE=1/2mv²
M= -di/do (=-hi/ho)
F= (9/5)C+ 32
N?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)

32. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
N?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
W= - kq1q2 (1/r2 - 1/r1)
The incident angle at which total internal reflection occurs (use ?r=90°)
V= 331 m/s + (.6 m/s°C)Temperature

33. Electric force formula? (two)
Felec=qE=[kq1q2]/r²
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Ebinding= ?m * c² (= (?m)c²)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

34. Work (only in terms of charge and voltage) formula

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35. Right-hand rule
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
931MeV=1amu
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Low

36. Apparent weight (weight of submerged object)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Intensity a Amplitude/ d²
Voltage=PE/q (remember Joules/Coulomb= volt)
Large/high

37. Critical angle is...
V=IR
Etotal= E rest + KE= mc² + (Y-1)mc²
The incident angle at which total internal reflection occurs (use ?r=90°)
Fnet=ma

38. High frequency wave shave...
Vfinal= V0 +at
Shorter ? - less diffraction - bigger shadow.
E0= 8.85 * 10?¹² C²/(Nm²)
E= kq/r² (= f/q)

39. Work function F is..?
Length stationary=Length moving/Y
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
M= -di/do (=-hi/ho)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

40. Formula for how velocity changes in air? (probably don't have to know)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
V= 331 m/s + (.6 m/s°C)Temperature
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
I=mr²

41. energy in a reaction q formula?
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
The incident angle at which total internal reflection occurs (use ?r=90°)
W=qVoltage. (think C* J/C and C's cancel out)

42. Torque formula
Voltage=PE/q (remember Joules/Coulomb= volt)
P=IV=I²R=V² /R = Fd/t= Force*velocity
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

43. Relativistic formula for velocity
F=GM1M2/r²
Vstationary obj.= [u+v] / [1 + uv/c²] (where u is velocity of large object - and v is velocity of "thrown" object relative to large object)
Ebinding= ?m * c² (= (?m)c²)
Induced current will flow opposite direction of magnetic flux.

44. Lenz's law
For every action there is an equal and opposite reaction
KE=1/2mv²
Induced current will flow opposite direction of magnetic flux.
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)

45. Centripetal acceleration formula
Large/high
Low
A=v²/ r
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)

46. Capacitance constant
E0= 8.85 * 10?¹² C²/(Nm²)
Q=m*L (where L is the latent heat of fusion or vaporization)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

47. Index of refraction formula
N= C/velocity.
?IE= - W (work)
Low
Y= 1/ v(1-(v/c)²)

48. Sign of focus for concave lens?
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Negative - focus behind the lens (= virtual image)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Positive - focus in front of the lens (=real image)

49. Electric field between two plates formula?
E= V/d
The incident angle at which total internal reflection occurs (use ?r=90°)
A=v²/ r
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.

50. What is the photoelectric effect?
A=v²/ r
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
F=mv²/ r
F=GM1M2/r²