Post the answer to any questions you remember here
Hey guys,
regarding the question of the capacitor. Can someone explain.
Also how is the decay rate going to be perceived if it is 14000 years and you check every few days.
I put sinusoidal but now realize how stupid I was.
Overall, I think it was a good test.
I put “roughly constant” for the 14000 year half life problem.
What was the answer to the question “Which household appliance is most likely to use radiation?”
Was stuck between heater and internet router
Def heater. Also I did the test on Sunday so not the same as you guys, but if the HL is 14000 years then within the scope of human life the decay approaches 0 - which is roughly constant, I’d wager.
What should be the raw score to get 800 in physics? I left two questions… that radiation one and relativity one. Other then that I think I can get 4-5 wrong at max or maybe if very lucky, no wrong at all.
I don’t remember much questions but few answers I remember are
-√GM/R+h
-decay at slowing rate.
loud speaker one (I could be wrong)
-wavelength-10cm
-intensity changes
I believe it was the smoke detector. I actually checked and it turns out that smoke detector radiation is a threat. http://www.epa.gov/radiation/sources/smoke_alarm.html
how do you know about the wavelength?
For the relativity one, I just went with the particle with the largest rest mass. The question was: if all these particles are moving at the same relativistic speed, which has the largest momentum?
800 cut off is usually a raw score between 60 and 65. 2 blank and 5 wrong should get an 800
@Ahlesaadat I don’t remember much about that loudspeaker question.AFAIK it said that if we move that spring like tube some 5cm, the sound becomes very faint as compared to that in original configuration. It means that 5cm should be the distance between the antinode and node, former being the node – which is equal to λ/2.
λ/2 = 5cm
λ = 10cm = wavelength.
For the relativity one, momentum at relativistic speeds is p = γm0v. Since the only thing changing between the particles is m0, it was the alpha particle because it has the largest rest mass. The Lorentz factor is determined by relative velocity which would be the same across all particles.
Unfortunately, I haven’t studied optics or waves that much because they aren’t covered in AP Physics C. For the radiation question, I was stuck between wireless router and smoke detector.
@ReadyForTheWind Same… left a lot of optics/wave problems blank
Hey guys,
I don’t think I was really prepared for this test, so I skipped about 7 questions, and I cant guarantee that I got all the other questions correct. The worse i could have done is get 10 questions wrong. Should I cancel my score and retake it in October? I want to take it in June, but I have to take SAT I that day 
@Dubudubu With 7 blank and 10 wrong you’ll probably be around 750…
if to you that’s worth canceling, go for it. I personally would not.
What did you guys get for the single slit problem and then increases the wavelength of the light?
Changing wavelength should change the color of the central maxima
I know that but the answer choice also asks about the brightness of the central maximum, which does not relate I think
How did adding a conductor affect the capacitance, charge, and potential difference?
@zhesah I may have been wrong-- but I said that capacitance increased, charge remained constant, and potential difference decreased.