<p>Also put D for center of mass.</p>
<p>Can anyone confirm getting 1x10^something…sorry for being so vague, it had to do with a person standing on a rotated merry-go-round…also F/4 for something…and there was something with options such as pi/2, 3pi/2, 2pi, etc.</p>
<p>1/2 pi I think</p>
<p>and yes for F/4</p>
<p>no clue about 1x10^something</p>
<hr>
<h2>Consolidated List ~60/75 Questions </h2>
<p>v/2L is fundamental frequency for string fastened at two ends
Resonance was an answer
For the graph given about a wave:
–period = 0.01s
–amplitude = 4
–wavelength = 6
For the graph given about potential energy versus distance:
–potential energy at x1 = a
–kinetic energy at x1 = b
75) B0 isnt necessary for emf (Confirmed)
beta particle emission question: nuclear mass stays the same
radioactive decay with half lives after 90 days = 8
Telephone messages —> visual images on screen = fiber optic cables (Confirmed)
students record distance travelled: 10.77 is average velocity (Confirmed)
two magnets are next to eachother:
–1st question: either one or both are permanent.
–2nd question: both are permanent (<strong>split)
Q = cv = 20x10^6
for 73) current is same (E) I1 = I2 = I3 (current stays same in series circuit)
for 74) use resistance eqn. R = PL/A answer was r3(thinnest)>r1(medium)>r2(fattest)
for the beginning like numbers 6-8 given graphs:
–relationship between mass and energy = E = mc^2 = straight line (B)
–relationship between freq. and energy = E=hf = straight line (B)
–intensity of monochromatic blue light (Straight horizontal line) (Confirmed)
optics question with converging lens: same size upside down
for 72) f/cos thetha
71) F = 40 N
First few questions:
–1) momentum of II is greater
–2) momentum is same
–3) momentum is same
optics question with plane mirror at an angle: image is virtual and not inverted(twist page and deal with it as a normal mirror question)
Least affects static shock when getting out of car: whether the engine is on (Confirmed)
Pulley with 2 masses of 50 N each and in equilibrium: Force on the rope is 50 N
The efficiency one being 40% (500K and 300K)
B for the field line diagrams w/ two opposite charges
80m for dropping something off a cliff
“II only” for the one with large and small boxes with temperature transfer (Confirmed)
For the 5 diagrams as choices with a satellite orbitting a planet. Mass and Radius varied.
–First problem, asked which had greates grav. force = answer E (m=2M r=R)
–Second problem = E (m=2M r=R)
Linear Expansion problem:Temp raised from 20 to 22 over to 20 to 30. deltaT raised 5x, so L raised 5x, and the answer = 0.015 cm
Rutherford Experiment problem: The size of nucleus was significantly smaller than that of the atom
Elevator problem: I only
Which of these could make the net force 0: I and II only (I got “vector sum=0, and that some could be in the same direction”, but not that they could be the same magnitude)
Work is the only nonvector quantity
Wave generator (deep –> shallow): The eqn that relates it is s1/lam1 = s2/lam2 because freq doesnt change : Answer = velocity of the waves changes (can’t remember values but used that equation to get ans = 3.2)
Which waves can interfere(sound somethign somthing) Answer: I, II, and III
Negatively charged rod and X and Y are ends of a piece of metal: Answer: voltage / net force = 0 (</strong>split)
Area under F vs t curve = impulse
Two different frequencies: beats (Confirmed)
Question underneath that: resonance (Confirmed)
Question underneath that: quality (Confirmed)
Center of mass of the frame: point D
F/4 for electrostatic force or something like that
pi/2 for person on merrygoround with radius 3 moving 5 rev /s
Center of mass of the frame: point D
A person throws an objects in the air, which graphs represents velocity v.s. time
–answ: the graph with the positive y-intercept that slopes down
Which of the following stays constant for (object)?
–answ: acceleration
What is not true regarding the beta particle?
–answ: Minimum potential energy
A ruler attached to table undergoes simple harmonic motion
An atom emits a beta particle –> KE is not conserved</p>
<p>No, the ruler was attached to something stationary. It underwent harmonic motion (vibration).</p>
<p>d) An atom emits a beta particle</p>
<p>ansr: Atom number changes… :(</p>
<p>e) Particle’s acceleration?</p>
<p>ansr: 5x10^6</p>
<p>The answer to the diagonal plane mirror question needs to be changed per my last post.</p>
<p>4 careless mistakes so far and 1 honest-to-God one. Hopefully it will stay in the mid-800.</p>
<p>
</p>
<p>How could it be circular motion? It only travels for a little distance and then it goes backwards. I put simple harmonic motion, because it seemed like the motion of a spring in a different direction. Granted, if you did a lab on it, you’re probably right.</p>
<p>Hmmm, I’m racking my brain here. For the ax+c curve it was obviously the dots that were clustered to look like a line.</p>
<p>I thoguht the beta particle one was the atomic number of an atom changes or soemthing like that…</p>
<p>For the center of center of mass I got the same as you but I was kind of confused because it said the pieces of metal were all the same size, shape and density but the bottom one had a larger mass. How does that work?
Another one I remember is about force between charges. Two charges of 10x10^19 with that constant being 10x10^-10 and the distance 10x10^10. I think i got 10x10^8. The numbers are all probably completely wrong, I’m hoping someone else knows what I’m talking about.
I put for the beta particle also that energy is not conserved.</p>
<p>For the beta-particle question about why there is a change in momentum, I thought the answer was “because another particle was emitted in the decay”, in this B- decay, another particle, called an electron-antineutrino is also emitted, this would cause a change in momentum…I would think? Maybe not…</p>
<p>Yeah but it asked about the momentum of the electron and the neutron didn’t it?</p>
<p>“I thoguht the beta particle one was the atomic number of an atom changes or soemthing like that”</p>
<p>Right, fixed…</p>
<p>"For the ax+c curve it was obviously the dots that were clustered to look like a line. "</p>
<p>With a positive y-intercept.</p>
<p>Yes (10char)…</p>
<p>I put simple harmonic motion for the ruler. Also for the center of mass, which one point d?</p>
<p>i didnt take physics but when i was done i checked out other SAT2s</p>
<p>and by far physics was the hardest, i couldnt even understand one question.</p>
<p>best of luck to you guys</p>
<p>For the second sound one, I got pitch; I didn’t get resonance as an answer at all.</p>
<p>ya…that’s what I got…</p>
<p>does anybody remember exactly what the second question asekd for?</p>
<p><a href=“http://en.wikipedia.org/wiki/Pitch_(music[/url])”>http://en.wikipedia.org/wiki/Pitch_(music)</a></p>
<p>Pitch represents the perceived fundamental frequency of a sound.</p>
<p>I still think the answer to the second one is pitch or whichever one that was…</p>
<p>I think it just asked which one depended on a sound’s fundamental frequency, though I may be wrong.</p>
<p>I agree with gohackers in fact I was just about to post the same link because it asked about the fundamental frequency.</p>
<p>Since momentum is a vector quantity, I put that there needed to be another particle to make momentum (beta) not equal to momentum (nucleus). If there were another particle released, momentum (beta) + momentum (other particle) - momentum (nucleus)=0.</p>