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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. Beat frequency
Q=m*L (where L is the latent heat of fusion or vaporization)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Beat frequency= |F1-F2|
C= Q/V = e0 *A/d

2. Internal energy....equals?
Y= 1/ v(1-(v/c)²)
Threshold frequency=F/h (= work functions/planck's constant)
Shorter ? - less diffraction - bigger shadow.
?IE= - W (work)

3. Impulse formula
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)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
?IE= - W (work)

4. Thin lens equation
The incident angle at which total internal reflection occurs (use ?r=90°)
?= 4L + 1.6d
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
1/f= 1/di + 1/do

5. Electric field between two plates formula?
4.14 10?¹5 eVs
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
E= V/d
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

6. Ideal gas law
A=v²/ r
W=qVoltage. (think C* J/C and C's cancel out)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
931MeV=1amu

7. Planck's constant in J*s?
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Felec=qE=[kq1q2]/r²
6.6310 ?³4 Js
Negative - focus behind the lens (= virtual image)

8. Conservation of momentum
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
?IE= - W (work)
Momentum is always conserved in the absence of an outside force

9. Sign of focus for convex lens?
Negative - focus behind the lens (= virtual image)
?IE= - W (work)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
KEmax= hf-F (= E-F= Energy of a photon - work function)

10. Maximum KE with which an emitted electron leaves is...?
KEmax= hf-F (= E-F= Energy of a photon - work function)
K= 9 * 10? Nm²/C²
I=mr²
V= 331 m/s + (.6 m/s°C)Temperature

11. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
The incident angle at which total internal reflection occurs (use ?r=90°)
Large/high
1.67*10?²7kg
Threshold frequency=F/h (= work functions/planck's constant)

12. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
Beat frequency= |F1-F2|
?= 4L + 1.6d
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
W=qVoltage. (think C* J/C and C's cancel out)

13. Sign of focus for concave lens?
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Positive - focus in front of the lens (=real image)
Shorter ? - less diffraction - bigger shadow.

14. Law of refraction
Etotal= E rest + KE= mc² + (Y-1)mc²
Voltage=PE/q (remember Joules/Coulomb= volt)
?= 4L + 1.6d
Ni sin?i=nrsin?r

15. Apparent weight (weight of submerged object)
Large/high
PE=mgh
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
F=mv²/ r

16. Centripetal force formula
Fb= mass of displaced fluid * gravity
1.6*10?¹? C
F=mv²/ r
P=IV=I²R=V² /R = Fd/t= Force*velocity

17. Formula for electric field?
E= kq/r² (= f/q)
A=v²/ r
Distance= velocity * time
Momentum is always conserved in the absence of an outside force

18. ONE END CAPPED PIPE FREQUENCY (Frequency/Harmonic series of a pipe closed at one ned)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Voltage=PE/q (remember Joules/Coulomb= volt)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

19. deBroglie wavelength explanation
?= 4L + 1.6d
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
P=IV=I²R=V² /R = Fd/t= Force*velocity
?p=f?t (where f is AVERAGE force and t is how long force is applied)

20. Magnetic force formula (for particle)?
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Ebinding= ?m * c² (= (?m)c²)
Vfinal= V0 +at
Induced current will flow opposite direction of magnetic flux.

21. (Full) Displacement formula
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
V= 331 m/s + (.6 m/s°C)Temperature
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage

22. Work performed by charge displacement? (hopefully...won't have to know)
W= - kq1q2 (1/r2 - 1/r1)
1.67*10?²7kg
E=hf (= Planck's constant*frequency)
Eff= 1- Qc/Qh = 1- Tc/Th

23. Binding energy explanation
V=IR
?Tstationary= Y (?Tmoving)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Large/high

24. Relativistic formula for time
?Tstationary= Y (?Tmoving)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Induced current will flow opposite direction of magnetic flux.
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

25. Threshold frequency explanation?
E=hf (= Planck's constant*frequency)
E0= 8.85 * 10?¹² C²/(Nm²)
Length stationary=Length moving/Y
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

26. Conversion factor from atomic mass units to MeV?
Zero.
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
(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)
931MeV=1amu

27. What is the photoelectric effect?
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Momentum is always conserved in the absence of an outside force
Voltage=PE/q (remember Joules/Coulomb= volt)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

28. Buoyant force formula
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
P=mv (?p=m?v)
Q=mc?T (where T is temperature)
Fb= mass of displaced fluid * gravity

29. High frequency wave shave...
Shorter ? - less diffraction - bigger shadow.
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
KE=1/2mv²
E= kq/r² (= f/q)

30. 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)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Etotal= E rest + KE= mc² + (Y-1)mc²

31. If you drop an object into water the volume displaced equals...
The volume of the object.
I=mr²
V=f?
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

32. ß? decay?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Negative - focus behind the lens (= virtual image)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)

33. speed of light
C= 3*108 m/s
V=f?
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)
E0= 8.85 * 10?¹² C²/(Nm²)

34. Efficiency of an engine formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
1.67*10?²7kg
Threshold frequency=F/h (= work functions/planck's constant)
Eff= 1- Qc/Qh = 1- Tc/Th

35. Converting Fahrenheit to Celsius
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
F= (9/5)C+ 32
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Fnet=ma

36. Newton's second law
E= V/d
Beat frequency= |F1-F2|
Fnet=ma
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

37. Momentum formula?
A=v²/ r
C= Q/V = e0 *A/d
M= -di/do (=-hi/ho)
P=mv (?p=m?v)

38. Electric force formula? (two)
PE=mgh
Felec=qE=[kq1q2]/r²
Ni sin?i=nrsin?r
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)

39. Formula for energy levels within any atom?

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40. 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)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
F=ILBsin? (?= angle btw. L and B)

41. Electron capture
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
F=mv²/ r
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
1/f= 1/di + 1/do

42. Threshold frequency formula?

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43. Lenz's law
Induced current will flow opposite direction of magnetic flux.
Low
P=mv (?p=m?v)
KE=1/2mv²

44. Magnification equation
M= -di/do (=-hi/ho)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
E= V/d
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

45. Faraday's law
Induced current will flow opposite direction of magnetic flux.
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Angle of incidence=Angle of reflection

46. Heat of fusion/vaporization fromula
F=ILBsin? (?= angle btw. L and B)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Momentum is always conserved in the absence of an outside force
Q=m*L (where L is the latent heat of fusion or vaporization)

47. Formula for energy of a photon?

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48. Heat formula
Q=mc?T (where T is temperature)
For every action there is an equal and opposite reaction
Ni sin?i=nrsin?r
Ebinding= ?m * c² (= (?m)c²)

49. Capacitance formula? (there are two)
Q=mc?T (where T is temperature)
C= Q/V = e0 *A/d
F= (9/5)C+ 32
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)

50. Work function F is..?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Angle of incidence=Angle of reflection
KEmax= hf-F (= E-F= Energy of a photon - work function)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.