<p>for magnety one i did same thing…
but after i thought about it a while i changed my mind and decided the electric potential one made no sense, they both had charges.<br>
i thought MAYBE the “net positive charge one” meant that there is a positive charge evenly distributed in the metal object ( B/C positve charge doesnt move)
the 2 sides are dofferently charged, but only because there is MORE negative over there, but the same abount of positive throughout</p>
<p>does that make sense to ANYONE? tell me im not comlpetly crazy?</p>
<p>i thought the test was a little harder than ONE of the practice tests i took, but i took another practice test from sparknotes.com and it was WAY harder.
i only took 2</p>
<p>I don’t think it could have been the net positive charge because there isn’t a positive charge throughout, the left side had a negative charge ( side X) and the right side had a positive charge (side Y); and I knew it couldn’t have been a,b,c, or d, so I put E. Of course I could be wrong.</p>
<p>nah wasn’t the answer to the first one beat and to second, quality, and to the last one, pitch?</p>
<p>and for the rod one, I thought both X, Y had the same net positive charge cuz
remember its the electrons that move
so at either end, there’s an equal amount of positive charge…
at least that was my reasoning</p>
<p>hmm… well in the princeton review book, there a similar problem and their explanation was that the charges get split on both sides, though I may be wrong.</p>
<p>Go hackers, the first one was beat. However the second one was either pitch or resonance, the third I think was quality.
However, no way the second was quality.</p>
<p>This was harder than the practice tests I took as well. </p>
<p>First answer is beats I’m definitely sure about that.
Second answer is pitch
Third answer is quality? </p>
<p>I’m taking AP Phys C Mech this year and decided to take the SAT II. Next year I’m taking C: E&M. </p>
<hr>
<h2>Consolidated List ~50/75 Questions (More than half the test)</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 / 13.4 m in fifth second (<em>split)
two magnets are next to eachother:
–1st question: either one or both are permanent.
–2nd question: both are permanent (</em><em>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 (D which is straight line with positive x intercept) (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
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 (</em>*split)
Area under F vs t curve = impulse
Two different frequencies: beats
Question underneath that: pitch
Question underneath that: quality</p>
<p>at metemen, I think I got them mixed up
ya the first one was def beat. and I remember doing a freaking 10 page long report on beat
and the second one i think was pitch. i don’t remember putting in resonance as the answer to any of the three questiosn. and the last one was quality. I can’t remember the order but
the three asnwers were pitch, beat, quality. i’m very postive</p>
<p>and for the metal rod one, electric field doesn’t make any sense. cuz its defined as
F over charge. and the ends X and Y have dfif charges ( one negative and the ohter postive) and of course the distance that will affect the F is different</p>
<p>oh the circuit had a battery of 10 V and a 2 ohm resistor and 2 microfrad capacitor were added in series .
First I was gonna apply C=Q/V equ. but I reasoned the voltage drop across the capacitor would not b a 10 V cuz it drops across the 2 ohm resistor first. so… I just left that one blank</p>
<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 / 13.4 m in fifth second (<em>split)
two magnets are next to eachother:
–1st question: either one or both are permanent.
–2nd question: both are permanent (</em><em>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 (D which is straight line with positive x intercept) (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
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 (</em>*split)
Area under F vs t curve = impulse
Two different frequencies: beats
Question underneath that: quality
Question underneath that: pitch</p>