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. deBroglie wavelength explanation
C= Q/V = e0 *A/d
Length stationary=Length moving/Y
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)


2. Planck's constant in J*s?
E0= 8.85 * 10?¹² C²/(Nm²)
Low
Negative - focus behind the lens (= virtual image)
6.6310 ?³4 Js


3. ß? decay?
Y= 1/ v(1-(v/c)²)
Vfinal= V0 +at
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)


4. Work formula
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Beat frequency= |F1-F2|
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
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)


5. (Full) Displacement formula
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Large/high
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)


6. Apparent weight (weight of submerged object)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
I=mr²
P=mv (?p=m?v)


7. K constant for electric field formula?
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
K= 9 * 10? Nm²/C²
1/f= 1/di + 1/do
I=mr²


8. Sign of focus for concave lens?
E= V/d
Induced current will flow opposite direction of magnetic flux.
P=IV=I²R=V² /R = Fd/t= Force*velocity
Positive - focus in front of the lens (=real image)


9. Capacitance formula? (there are two)
P=mv (?p=m?v)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
C= Q/V = e0 *A/d
The volume of the object.


10. New/old gas formula?

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11. Heat formula
Positive - focus in front of the lens (=real image)
Q=mc?T (where T is temperature)
Induced current will flow opposite direction of magnetic flux.
1/f= 1/di + 1/do


12. Beat frequency
Beat frequency= |F1-F2|
Y= 1/ v(1-(v/c)²)
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)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)


13. Formula for magnetic flux?
Longer ? - larger diffraction - smaller shadow.
Shorter ? - less diffraction - bigger shadow.
Ni sin?i=nrsin?r
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)


14. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
Product of each lens's magnification
Zero.
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)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)


15. Potential Energy formula
PE=mgh
Intensity a Amplitude/ d²
Beat frequency= |F1-F2|
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)


16. Transformer formula

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17. Internal energy....equals?
Fnet=ma
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)
E=hf (= Planck's constant*frequency)
?IE= - W (work)


18. Efficiency of an engine formula
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Eff= 1- Qc/Qh = 1- Tc/Th
C= 3*108 m/s
?= 4L + 1.6d


19. Gravitational constant
KE= (Y-1)mc² (= (Y-1)E)
G= 6.67 * 10?¹¹ Nm²/kg²
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)


20. Elastic potential energy for a spring formula
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Length stationary=Length moving/Y
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)


21. Index of refraction formula
N= C/velocity.
Ni sin?i=nrsin?r
Positive - focus in front of the lens (=real image)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.


22. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
Fb= mass of displaced fluid * gravity
Beat frequency= |F1-F2|
?= 4L + 1.6d
E=hf (= Planck's constant*frequency)


23. Thin lens equation
E=hf (= Planck's constant*frequency)
The volume of the object.
1/f= 1/di + 1/do
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)


24. energy in a reaction q formula?
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Fnet=ma
G= 6.67 * 10?¹¹ Nm²/kg²


25. Relativistic formula for (kinetic) energy
F=GM1M2/r²
KE= (Y-1)mc² (= (Y-1)E)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
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)


26. Moment of Inertia (a.k.a. rotational mass)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
I=mr²
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Fnet=ma


27. Relativistic formula for velocity
E0= 8.85 * 10?¹² C²/(Nm²)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
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)


28. Power formula?
Q=mc?T (where T is temperature)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Negative - focus behind the lens (= virtual image)
1.6*10?¹? C


29. Binding energy explanation
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
V=f?


30. Formula for energy of a photon?

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31. ß? decay?
Angle of incidence=Angle of reflection
Vfinal²=V0²+ 2ad
F=ILBsin? (?= angle btw. L and B)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)


32. Activity of a radioactive sample formula? (probably don't have to know)
For every action there is an equal and opposite reaction
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)


33. Threshold frequency explanation?
Threshold frequency=F/h (= work functions/planck's constant)
A=v²/ r
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)


34. Planck's constant in electronvolts* seconds?
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
4.14 10?¹5 eVs
V= 331 m/s + (.6 m/s°C)Temperature
Fb= mass of displaced fluid * gravity


35. Impulse formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Vfinal= V0 +at
F= (9/5)C+ 32
4.14 10?¹5 eVs


36. Newton's first law (Law of...)
W= - kq1q2 (1/r2 - 1/r1)
(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)
Y= 1/ v(1-(v/c)²)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.


37. Centripetal acceleration formula
A=v²/ r
I=mr²
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
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. Momentum formula?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
?= 4L + 1.6d
P=mv (?p=m?v)
Voltage=PE/q (remember Joules/Coulomb= volt)


39. What is the apparent weight of a floating object?
I=mr²
Zero.
Vfinal²=V0²+ 2ad
Beat frequency= |F1-F2|


40. (Full/Final) Velocity formula
Vfinal= V0 +at
Voltage=PE/q (remember Joules/Coulomb= volt)
M= -di/do (=-hi/ho)
E= V/d


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

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42. Formula for how velocity changes in air? (probably don't have to know)
931MeV=1amu
?p=f?t (where f is AVERAGE force and t is how long force is applied)
C= 3*108 m/s
V= 331 m/s + (.6 m/s°C)Temperature


43. Centripetal force formula
Voltage=PE/q (remember Joules/Coulomb= volt)
Vfinal²=V0²+ 2ad
E0= 8.85 * 10?¹² C²/(Nm²)
F=mv²/ r


44. Electron capture
Fb= mass of displaced fluid * gravity
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Length stationary=Length moving/Y
Eff= 1- Qc/Qh = 1- Tc/Th


45. Ideal gas law
Large/high
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
1.6*10?¹? C
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)


46. 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
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)


47. speed of light
The volume of the object.
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
C= 3*108 m/s
1.67*10?²7kg


48. If speed is slow/low - index of refraction is...
Q=mc?T (where T is temperature)
Large/high
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
K= 9 * 10? Nm²/C²


49. Threshold frequency formula?

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50. Magnification equation
M= -di/do (=-hi/ho)
W= - kq1q2 (1/r2 - 1/r1)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
V=IR