<p>Ah, the 20-Ohm resistor. Then yeah, 1/2H.</p>
<p>
[quote]
Tension force largest at top of swing of pendulum
[/quote]
</p>
<p>Probably not. It's greatest in equilibrum position, since G is accelerating mass in the fully opposite direction of normaling force of rope (tension). Just imagine. </p>
<p>And for this masses on pulley, it's 100% 2W. If you have a 2kg lamp hanging on a ceiling, this ceiling will have to hang 2kg, it's impossible to reduce that mass through any system.</p>
<p>Well its (1/2)H if it was for the same amount of time.. i thought i read twice the time.. ughh.. i cant read. grr.</p>
<p>Actually, I am not even sure if it says the same amount of time. Anyone here read the whole question?</p>
<p>dangit... i had no idea they were talkin about the rope that the <em>pulley</em> was suspended from... lol
crap... stupid mistakes</p>
<p>I think I did pretty well (700+), but a couple stupid mistakes..</p>
<p>I really think that they were subjected to the current for the same amount of time... I mean, they're in the same circuit... Seems like the blurb would've been too big if college board had bothered to specify a respective time length for each resistor...</p>
<p>A lot of the answers don't match with mine, do we have different forms?</p>
<p>Do you guys know if December has big curves or not? My friends say that December has all those Seniors who don't do as well, and the curve is very generous. Is it true?</p>
<p>oh that would be too good :) I omited 5-6q's + 6 at the end, and 2-4 wrong. Hoping for something like 750? 730? Don't know what to expect...</p>
<p>did anyone else think december's test was really heard?</p>
<p>what did u guys get for these questions:</p>
<p>do u remember getting answers like:
initial KE of block and stored PE of spring?
galvometer held stationary constant current?
tension of the cord holding pulley-2w?
20 km 45 degrees N of E?
entropy of system increases?</p>
<p>what did these graphs look like?
two waves with different frequencies?
out of phase?
mag a. v t in projectile motion
graph of displacement v. time for projectile
graph of speed v. time for projectile</p>
<p>expansion of universe 1) red shift 2) radiation 3) elliptical?
boiling point beaker?
a root b graph?</p>
<p>O yea was the bp of the beaker the one about pressure of vapor being equal to atmospheric pressure?</p>
<p>and expansion of the universe #1 and 2?</p>
<p>I guessed on both of those</p>
<p>yeah, it boils when the vapor pressure at the surface equals the atmospheric pressure. and i went with one and two for the expanding universe one as well... still not sure if elliptical orbits is evidence as well</p>
<p>Tension on the pulley rope is 2W.</p>
<p>It was 28 km 45degrees N of E</p>
<p>sushirave, i think it was actually 28km 45 NE. </p>
<p>the moon question... was it that the person has a mass 1/6 of his/her mass on earth?</p>
<p>Mass doesn't change, Weight does. The answer had something to do with throwing the ball 6 times as high.</p>
<p>i specifically remember it was heat dissipated in the same amount of time, so p=i2r, and there was a 40 ohm and 20 ohm resistor, it asked if h was dissipated in 40 ohm, how much is dissipated in 20 ohm resistor in the same time. this is probably the only question im sure of. im also more than 60% sure that the pulley question asked tension in the string holding the pulley, so it was 2W. if only i could remember the questions better..</p>
<p>ohh wow. totally forgot about mass never changing. what a dumb mistake...</p>
<p>the roman numerals got me. =/.</p>
<p>more light/optic questions than i had expected as well.</p>
<p>what was the answer to the red/blue light question? i forget what it was asking.. i THINK it asked which property is greater in blue or something like htat? i think the answer was frequency?</p>