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

2. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
1.67*10?²7kg
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)

3. What is the apparent weight of a floating object?
Zero.
Large/high
1/f= 1/di + 1/do
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

4. Relativistic factor Y formula
P=mv (?p=m?v)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/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)
Y= 1/ v(1-(v/c)²)

5. Lenz's law
Induced current will flow opposite direction of magnetic flux.
Q=mc?T (where T is temperature)
F=ILBsin? (?= angle btw. L and B)
4.14 10?¹5 eVs

6. Conversion factor from atomic mass units to MeV?
Beat frequency= |F1-F2|
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Q=mc?T (where T is temperature)
931MeV=1amu

7. Total KE formula
Etotal= E rest + KE= mc² + (Y-1)mc²
V=f?
Eff= 1- Qc/Qh = 1- Tc/Th
P=mv (?p=m?v)

8. Capacitance constant
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Product of each lens's magnification
E0= 8.85 * 10?¹² C²/(Nm²)
Zero.

9. Work performed by charge displacement? (hopefully...won't have to know)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
1/f= 1/di + 1/do
W= - kq1q2 (1/r2 - 1/r1)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

10. Relativistic formula for time
Q=m*L (where L is the latent heat of fusion or vaporization)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Low
?Tstationary= Y (?Tmoving)

11. (Full/Final) Velocity formula
Vfinal= V0 +at
PE=mgh
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

12. Electric field between two plates formula?
P=mv (?p=m?v)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
E= V/d

13. Internal energy....equals?
Y= 1/ v(1-(v/c)²)
?IE= - W (work)
Beat frequency= |F1-F2|
Intensity a Amplitude/ d²

14. magnitude of charge on electron/proton
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
V=IR
PE=mgh
1.6*10?¹? C

15. Formula for how velocity changes in air? (probably don't have to know)
Product of each lens's magnification
V= 331 m/s + (.6 m/s°C)Temperature
W=qVoltage. (think C* J/C and C's cancel out)
?= 4L + 1.6d

16. Magnetic force formula (for wire)?
F=ILBsin? (?= angle btw. L and B)
Voltage=PE/q (remember Joules/Coulomb= volt)
Longer ? - larger diffraction - smaller shadow.
(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)

17. Binding energy formula
Ebinding= ?m * c² (= (?m)c²)
6.6310 ?³4 Js
Q=m*L (where L is the latent heat of fusion or vaporization)
Eff= 1- Qc/Qh = 1- Tc/Th

18. Magnetic force formula (for particle)?
KEmax= hf-F (= E-F= Energy of a photon - work function)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
The incident angle at which total internal reflection occurs (use ?r=90°)
F=mv²/ r

19. Sign of focus for convex lens?
KE=1/2mv²
V=IR
1.6*10?¹? C
Negative - focus behind the lens (= virtual image)

20. Newton's first law (Law of...)
Vfinal²=V0²+ 2ad
V= 331 m/s + (.6 m/s°C)Temperature
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

21. Newton's second law
?p=f?t (where f is AVERAGE force and t is how long force is applied)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Fnet=ma
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

22. Magnification equation
M= -di/do (=-hi/ho)
?Tstationary= Y (?Tmoving)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Positive - focus in front of the lens (=real image)

23. Formula for magnetic flux?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Q=m*L (where L is the latent heat of fusion or vaporization)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

24. Formula for energy of a photon?

25. deBrolglie wavelength formula

26. ß? decay?
Distance= velocity * time
Felec=qE=[kq1q2]/r²
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
A=v²/ r

27. Formula for velocity of waves?
Large/high
V=f?
P=mv (?p=m?v)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)

28. Gravitational constant
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Product of each lens's magnification
G= 6.67 * 10?¹¹ Nm²/kg²
F=ILBsin? (?= angle btw. L and B)

29. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Voltage=PE/q (remember Joules/Coulomb= volt)
V= 331 m/s + (.6 m/s°C)Temperature
F=GM1M2/r²

30. Impulse formula
F=GM1M2/r²
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Distance= velocity * time

31. Sign of focus for concave lens?
Positive - focus in front of the lens (=real image)
G= 6.67 * 10?¹¹ Nm²/kg²
Eff= 1- Qc/Qh = 1- Tc/Th
V=IR

32. Power formula?
N= C/velocity.
P=IV=I²R=V² /R = Fd/t= Force*velocity
Zero.
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)

33. Torque formula
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)

34. Kinetic Energy formula
KE=1/2mv²
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
W=qVoltage. (think C* J/C and C's cancel out)
Vfinal= V0 +at

35. If speed is slow/low - index of refraction is...
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Large/high
V=f?
4.14 10?¹5 eVs

36. Work formula
Eff= 1- Qc/Qh = 1- Tc/Th
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

37. Centripetal force formula
Q=mc?T (where T is temperature)
E= kq/r² (= f/q)
F=mv²/ r
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)

38. Moment of Inertia (a.k.a. rotational mass)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Large/high
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
I=mr²

39. Right-hand rule
Longer ? - larger diffraction - smaller shadow.
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Fnet=ma
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.

40. K constant for electric field formula?
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
I=mr²
K= 9 * 10? Nm²/C²
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

41. Electron capture
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Felec=qE=[kq1q2]/r²

42. Critical angle is...
6.6310 ?³4 Js
The incident angle at which total internal reflection occurs (use ?r=90°)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Q=mc?T (where T is temperature)

43. Newton's third law
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
For every action there is an equal and opposite reaction
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
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)

44. Voltage formula (think units of volts are what?) (NOT in terms of I and R)
PE=mgh
Q=m*L (where L is the latent heat of fusion or vaporization)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Voltage=PE/q (remember Joules/Coulomb= volt)

45. Momentum formula?
1.67*10?²7kg
P=mv (?p=m?v)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)

46. speed of light
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Fb= mass of displaced fluid * gravity
KE= (Y-1)mc² (= (Y-1)E)
C= 3*108 m/s

47. Law of refraction
Ni sin?i=nrsin?r
1.6*10?¹? C
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)

48. Threshold frequency explanation?
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Fnet=ma
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Beat frequency= |F1-F2|

49. Potential Energy formula
P=mv (?p=m?v)
931MeV=1amu
PE=mgh
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

50. Elastic potential energy for a spring formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
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)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
P=mv (?p=m?v)