Test your basic knowledge |

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. Graviational force formula
F=GM1M2/r²
?Tstationary= Y (?Tmoving)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
G= 6.67 * 10?¹¹ Nm²/kg²

2. ß? decay?
Fb= mass of displaced fluid * gravity
G= 6.67 * 10?¹¹ Nm²/kg²
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

3. K constant for electric field formula?
K= 9 * 10? Nm²/C²
Eff= 1- Qc/Qh = 1- Tc/Th
(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)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

4. If speed is high - index of refraction is....
E0= 8.85 * 10?¹² C²/(Nm²)
Low
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage

5. Formula for electric potential energy?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
V= 331 m/s + (.6 m/s°C)Temperature
Positive - focus in front of the lens (=real image)

6. Relativistic formula for velocity
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
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)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)

7. Total KE formula
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Etotal= E rest + KE= mc² + (Y-1)mc²
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.

8. Work function F is..?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Vfinal= V0 +at
931MeV=1amu
E=hf (= Planck's constant*frequency)

9. Formula for magnetic flux?
(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)
Beat frequency= |F1-F2|
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

10. Mass defect explanation

11. Planck's constant in J*s?
Intensity a Amplitude/ d²
V= 331 m/s + (.6 m/s°C)Temperature
6.6310 ?³4 Js
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)

12. Capacitance constant
E0= 8.85 * 10?¹² C²/(Nm²)
V=IR
K= 9 * 10? Nm²/C²
For every action there is an equal and opposite reaction

13. Voltage formula (think units of volts are what?) (NOT in terms of I and R)
M= -di/do (=-hi/ho)
Voltage=PE/q (remember Joules/Coulomb= volt)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)

14. If speed is slow/low - index of refraction is...
Longer ? - larger diffraction - smaller shadow.
931MeV=1amu
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Large/high

15. Formula for energy of a photon?

16. Relativistic formula for length
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
KEmax= hf-F (= E-F= Energy of a photon - work function)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Length stationary=Length moving/Y

17. Conservation of momentum
Momentum is always conserved in the absence of an outside force
1.6*10?¹? C
M= -di/do (=-hi/ho)
F=GM1M2/r²

18. Activity of a radioactive sample formula? (probably don't have to know)
Large/high
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
P=mv (?p=m?v)
W=qVoltage. (think C* J/C and C's cancel out)

19. Magnification equation
The volume of the object.
M= -di/do (=-hi/ho)
Angle of incidence=Angle of reflection
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)

20. Relativistic formula for time
?Tstationary= Y (?Tmoving)
F=GM1M2/r²
The incident angle at which total internal reflection occurs (use ?r=90°)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)

21. Index of refraction formula
?IE= - W (work)
P=mv (?p=m?v)
N= C/velocity.
Large/high

22. Electric field between two plates formula?
Q=m*L (where L is the latent heat of fusion or vaporization)
E= V/d
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
PE=mgh

23. Potential Energy formula
Fnet=ma
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
PE=mgh

24. Binding energy formula
Positive - focus in front of the lens (=real image)
Ebinding= ?m * c² (= (?m)c²)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Etotal= E rest + KE= mc² + (Y-1)mc²

25. Formula for energy levels within any atom?

26. Efficiency of an engine formula
Eff= 1- Qc/Qh = 1- Tc/Th
Threshold frequency=F/h (= work functions/planck's constant)
Negative - focus behind the lens (= virtual image)
Vfinal= V0 +at

27. Ideal gas law
Y= 1/ v(1-(v/c)²)
M= -di/do (=-hi/ho)
V=f?
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

28. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
Q=mc?T (where T is temperature)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
?= 4L + 1.6d
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)

29. Newton's first law (Law of...)
P=mv (?p=m?v)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Momentum is always conserved in the absence of an outside force
?p=f?t (where f is AVERAGE force and t is how long force is applied)

30. (Full/Final) Velocity formula
Longer ? - larger diffraction - smaller shadow.
1/f= 1/di + 1/do
Vfinal= V0 +at
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

31. energy in a reaction q formula?
1.67*10?²7kg
F= (9/5)C+ 32
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)

32. Capacitance formula? (there are two)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
E= kq/r² (= f/q)
The volume of the object.
C= Q/V = e0 *A/d

33. Thin lens equation
Large/high
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
1/f= 1/di + 1/do
Beat frequency= |F1-F2|

34. ß? decay?
4.14 10?¹5 eVs
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
V=IR
Felec=qE=[kq1q2]/r²

35. Light intensity is proportional to..
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Intensity a Amplitude/ d²
N= C/velocity.

36. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)

37. Centripetal force formula
Large/high
E=hf (= Planck's constant*frequency)
Positive - focus in front of the lens (=real image)
F=mv²/ r

38. magnitude of charge on electron/proton
6.6310 ?³4 Js
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
1.6*10?¹? C
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).

39. Internal energy....equals?
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
?IE= - W (work)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V

40. Voltage formula (for circuit - etc.)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Voltage=PE/q (remember Joules/Coulomb= volt)
Longer ? - larger diffraction - smaller shadow.
V=IR

41. Transformer formula

42. deBrolglie wavelength formula

43. Lenz's law
(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)
Induced current will flow opposite direction of magnetic flux.
Voltage=PE/q (remember Joules/Coulomb= volt)
G= 6.67 * 10?¹¹ Nm²/kg²

44. Buoyant force formula
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Fb= mass of displaced fluid * gravity
W= - kq1q2 (1/r2 - 1/r1)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

45. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
?Tstationary= Y (?Tmoving)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
1.67*10?²7kg

46. Energy of an emitted photon formula?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
?p=f?t (where f is AVERAGE force and t is how long force is applied)

47. What is the apparent weight of a floating object?
V=f?
F=mv²/ r
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Zero.

48. Beat frequency
Beat frequency= |F1-F2|
Threshold frequency=F/h (= work functions/planck's constant)
E= V/d
Eff= 1- Qc/Qh = 1- Tc/Th

49. Work performed by charge displacement? (hopefully...won't have to know)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
W= - kq1q2 (1/r2 - 1/r1)
M= -di/do (=-hi/ho)

50. High frequency wave shave...
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Ni sin?i=nrsin?r
Positive - focus in front of the lens (=real image)
Shorter ? - less diffraction - bigger shadow.