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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. Voltage formula (for circuit - etc.)
KE=1/2mv²
V=IR
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)

2. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
1.67*10?²7kg
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Longer ? - larger diffraction - smaller shadow.
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)

3. Electric force formula? (two)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Threshold frequency=F/h (= work functions/planck's constant)
Felec=qE=[kq1q2]/r²

4. Formula for magnetic flux?
Length stationary=Length moving/Y
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Beat frequency= |F1-F2|

5. (Full) Displacement formula
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Y= 1/ v(1-(v/c)²)
C= 3*108 m/s
E= V/d

6. Binding energy formula
Ebinding= ?m * c² (= (?m)c²)
W=qVoltage. (think C* J/C and C's cancel out)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
KEmax= hf-F (= E-F= Energy of a photon - work function)

7. Right-hand rule
W=qVoltage. (think C* J/C and C's cancel out)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
1.67*10?²7kg
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

8. Critical angle is...
The incident angle at which total internal reflection occurs (use ?r=90°)
P=mv (?p=m?v)
Longer ? - larger diffraction - smaller shadow.
F= (9/5)C+ 32

9. Sign of focus for convex lens?
Large/high
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Negative - focus behind the lens (= virtual image)

10. Formula for energy levels within any atom?

11. Low frequency waves have...
Longer ? - larger diffraction - smaller shadow.
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Voltage=PE/q (remember Joules/Coulomb= volt)
?IE= - W (work)

12. Relativistic factor Y formula
Y= 1/ v(1-(v/c)²)
Beat frequency= |F1-F2|
?IE= - W (work)
PE=mgh

13. Index of refraction formula
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)
N= C/velocity.
Vfinal= V0 +at
Felec=qE=[kq1q2]/r²

14. Potential Energy formula
C= 3*108 m/s
Shorter ? - less diffraction - bigger shadow.
Zero.
PE=mgh

15. Light intensity is proportional to..
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Intensity a Amplitude/ d²
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)
Large/high

16. Law of reflection
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Positive - focus in front of the lens (=real image)
Angle of incidence=Angle of reflection
Ebinding= ?m * c² (= (?m)c²)

17. Relativistic formula for time
PE=mgh
?= 4L + 1.6d
M= -di/do (=-hi/ho)
?Tstationary= Y (?Tmoving)

18. Relativistic formula for length
Length stationary=Length moving/Y
N= C/velocity.
Intensity a Amplitude/ d²
Positive - focus in front of the lens (=real image)

19. Faraday's law
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Eff= 1- Qc/Qh = 1- Tc/Th

20. Gravitational constant
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
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)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
G= 6.67 * 10?¹¹ Nm²/kg²

21. New/old gas formula?

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

23. Newton's second law
Fb= mass of displaced fluid * gravity
Fnet=ma
F=ILBsin? (?= angle btw. L and B)
M= -di/do (=-hi/ho)

24. (Full/Final) Velocity formula
A=v²/ r
P=IV=I²R=V² /R = Fd/t= Force*velocity
Vfinal= V0 +at
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

25. Planck's constant in electronvolts* seconds?
V= 331 m/s + (.6 m/s°C)Temperature
F= (9/5)C+ 32
P=mv (?p=m?v)
4.14 10?¹5 eVs

26. Elastic potential energy for a spring formula
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)

27. Formula for electric potential energy?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
I=mr²
Etotal= E rest + KE= mc² + (Y-1)mc²
Q=m*L (where L is the latent heat of fusion or vaporization)

28. Buoyant force formula
Fb= mass of displaced fluid * gravity
?= 4L + 1.6d
Eff= 1- Qc/Qh = 1- Tc/Th
F= (9/5)C+ 32

29. Centripetal acceleration formula
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Fnet=ma
A=v²/ r
E0= 8.85 * 10?¹² C²/(Nm²)

30. Efficiency of an engine formula
Zero.
Eff= 1- Qc/Qh = 1- Tc/Th
1/f= 1/di + 1/do
C= Q/V = e0 *A/d

31. Torque formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
?= 4L + 1.6d
Beat frequency= |F1-F2|
V= 331 m/s + (.6 m/s°C)Temperature

32. Heat formula
Felec=qE=[kq1q2]/r²
F=ILBsin? (?= angle btw. L and B)
?= 4L + 1.6d
Q=mc?T (where T is temperature)

33. Newton's third law
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
For every action there is an equal and opposite reaction
1.67*10?²7kg
Momentum is always conserved in the absence of an outside force

34. Total KE formula
(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)
Etotal= E rest + KE= mc² + (Y-1)mc²
F=GM1M2/r²
Beat frequency= |F1-F2|

35. What is the photoelectric effect?
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Positive - focus in front of the lens (=real image)

36. Magnetic force formula (for particle)?
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Length stationary=Length moving/Y
Product of each lens's magnification

37. Relativistic formula for (kinetic) energy
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)
KE= (Y-1)mc² (= (Y-1)E)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
P=IV=I²R=V² /R = Fd/t= Force*velocity

38. 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)
Vfinal²=V0²+ 2ad
6.6310 ?³4 Js
F=ILBsin? (?= angle btw. L and B)

39. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
Q=mc?T (where T is temperature)
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)
?= 4L + 1.6d
Fb= mass of displaced fluid * gravity

40. Momentum formula?
Intensity a Amplitude/ d²
N= C/velocity.
P=mv (?p=m?v)
V=f?

41. If speed is slow/low - index of refraction is...
I=mr²
Product of each lens's magnification
Large/high
?IE= - W (work)

42. Power formula?
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
P=IV=I²R=V² /R = Fd/t= Force*velocity
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)
Shorter ? - less diffraction - bigger shadow.

43. Work performed by charge displacement? (hopefully...won't have to know)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Intensity a Amplitude/ d²
?= 4L + 1.6d
W= - kq1q2 (1/r2 - 1/r1)

44. Distance formula?
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Distance= velocity * time
E=hf (= Planck's constant*frequency)
Vfinal= V0 +at

45. Converting Fahrenheit to Celsius
Positive - focus in front of the lens (=real image)
Longer ? - larger diffraction - smaller shadow.
F= (9/5)C+ 32
Low

46. Electron capture
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
1.6*10?¹? C
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)

47. ß? decay?
W= - kq1q2 (1/r2 - 1/r1)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Q=mc?T (where T is temperature)

48. magnitude of charge on electron/proton
Ni sin?i=nrsin?r
Intensity a Amplitude/ d²
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
1.6*10?¹? C

49. Moment of Inertia (a.k.a. rotational mass)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
I=mr²
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Q=mc?T (where T is temperature)

50. Newton's first law (Law of...)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
K= 9 * 10? Nm²/C²
Eff= 1- Qc/Qh = 1- Tc/Th
Zero.