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SAT Subject Test: Physics Formulas

Instructions:

Answer 50 questions in 15 minutes.
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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. Capacitance formula? (there are two)
Distance= velocity * time
C= Q/V = e0 *A/d
Angle of incidence=Angle of reflection
Vfinal= V0 +at

2. ß? decay?
F=mv²/ r
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Positive - focus in front of the lens (=real image)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

3. Newton's second law
V=IR
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Fnet=ma
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

4. speed of light
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
C= 3*108 m/s
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
For every action there is an equal and opposite reaction

5. Binding energy explanation
Induced current will flow opposite direction of magnetic flux.
F=GM1M2/r²
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Ni sin?i=nrsin?r

6. Formula for electric potential energy?
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Momentum is always conserved in the absence of an outside force
Length stationary=Length moving/Y

7. Relativistic formula for velocity
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
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)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).

8. Elastic potential energy for a spring formula
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
E=hf (= Planck's constant*frequency)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
C= Q/V = e0 *A/d

9. Activity of a radioactive sample formula? (probably don't have to know)
Felec=qE=[kq1q2]/r²
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
E= kq/r² (= f/q)

10. Heat formula
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
F=ILBsin? (?= angle btw. L and B)
Q=mc?T (where T is temperature)
Vfinal²=V0²+ 2ad

11. Ideal gas law
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
KE=1/2mv²
Zero.
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

12. Total KE formula
Etotal= E rest + KE= mc² + (Y-1)mc²
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Voltage=PE/q (remember Joules/Coulomb= volt)

13. Heat of fusion/vaporization fromula
Q=m*L (where L is the latent heat of fusion or vaporization)
(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)
Felec=qE=[kq1q2]/r²
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

14. Kinetic Energy formula
KE=1/2mv²
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Ni sin?i=nrsin?r
?p=f?t (where f is AVERAGE force and t is how long force is applied)

15. Conversion factor from atomic mass units to MeV?
Felec=qE=[kq1q2]/r²
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Distance= velocity * time
931MeV=1amu

16. Torque formula
Y= 1/ v(1-(v/c)²)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Vfinal= V0 +at
Fb= mass of displaced fluid * gravity

17. Beat frequency
W= - kq1q2 (1/r2 - 1/r1)
Beat frequency= |F1-F2|
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

18. What is the photoelectric effect?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
C= 3*108 m/s
1.67*10?²7kg
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

19. Magnetic force formula (for particle)?
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)

20. Centripetal force formula
1.6*10?¹? C
V=IR
F=mv²/ r
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage

21. Faraday's law
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
W= - kq1q2 (1/r2 - 1/r1)
KEmax= hf-F (= E-F= Energy of a photon - work function)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)

22. Work formula
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Threshold frequency=F/h (= work functions/planck's constant)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

23. (Full/Final) Velocity formula
Felec=qE=[kq1q2]/r²
Fb= mass of displaced fluid * gravity
Vfinal= V0 +at
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)

24. deBrolglie wavelength formula

25. Distance formula?
Angle of incidence=Angle of reflection
Distance= velocity * time
Induced current will flow opposite direction of magnetic flux.
Q=m*L (where L is the latent heat of fusion or vaporization)

26. Electric field between two plates formula?
F=GM1M2/r²
Momentum is always conserved in the absence of an outside force
E= V/d
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

27. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
Etotal= E rest + KE= mc² + (Y-1)mc²
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Fnet=ma

28. Law of reflection
Beat frequency= |F1-F2|
Angle of incidence=Angle of reflection
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
G= 6.67 * 10?¹¹ Nm²/kg²

29. If speed is slow/low - index of refraction is...
Large/high
V=IR
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)

30. New/old gas formula?

31. Relativistic formula for time
?Tstationary= Y (?Tmoving)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
V=IR
N= C/velocity.

32. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Length stationary=Length moving/Y
1.67*10?²7kg
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)

33. Light intensity is proportional to..
Q=mc?T (where T is temperature)
?Tstationary= Y (?Tmoving)
4.14 10?¹5 eVs
Intensity a Amplitude/ d²

34. Relativistic factor Y formula
Voltage=PE/q (remember Joules/Coulomb= volt)
Y= 1/ v(1-(v/c)²)
6.6310 ?³4 Js
Angle of incidence=Angle of reflection

35. Energy of an emitted photon formula?
KE=1/2mv²
E0= 8.85 * 10?¹² C²/(Nm²)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)

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

37. Sign of focus for concave lens?
Positive - focus in front of the lens (=real image)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
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)

38. Capacitance constant
Felec=qE=[kq1q2]/r²
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Ni sin?i=nrsin?r
E0= 8.85 * 10?¹² C²/(Nm²)

39. Power formula?
PE=mgh
P=IV=I²R=V² /R = Fd/t= Force*velocity
KEmax= hf-F (= E-F= Energy of a photon - work function)
V=f?

40. How to find total magnification?

41. Planck's constant in electronvolts* seconds?
4.14 10?¹5 eVs
Vfinal²=V0²+ 2ad
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Positive - focus in front of the lens (=real image)

42. Apparent weight (weight of submerged object)
M= -di/do (=-hi/ho)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Zero.
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

43. Conservation of momentum
Momentum is always conserved in the absence of an outside force
Threshold frequency=F/h (= work functions/planck's constant)
E0= 8.85 * 10?¹² C²/(Nm²)
Length stationary=Length moving/Y

44. Right-hand rule
Q=m*L (where L is the latent heat of fusion or vaporization)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Low
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

45. Relativistic formula for (kinetic) energy
Zero.
Q=mc?T (where T is temperature)
?IE= - W (work)
KE= (Y-1)mc² (= (Y-1)E)

46. 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=qVoltage. (think C* J/C and C's cancel out)
Low
For every action there is an equal and opposite reaction

47. Thin lens equation
Q=m*L (where L is the latent heat of fusion or vaporization)
Large/high
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
1/f= 1/di + 1/do

48. Formula for diffraction pattern - Anti-node to node (A-N)
(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)
Vfinal²=V0²+ 2ad
1/f= 1/di + 1/do
The incident angle at which total internal reflection occurs (use ?r=90°)

49. (Full) Displacement formula
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
For every action there is an equal and opposite reaction
W=qVoltage. (think C* J/C and C's cancel out)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

50. Law of refraction
Positive - focus in front of the lens (=real image)
1.6*10?¹? C
Ni sin?i=nrsin?r
Threshold frequency=F/h (= work functions/planck's constant)