<p>That's right, but wouldn't one of the other answers solve it as well? Was it asking for velocity?</p>
<p>i think it asked for the easiest/most accurate way</p>
<p>12 cycles? that doesn't sound familiar. unless we're talking about different ones and we're on a different wavelength (pun intended)</p>
<p>maybe the answer choice didn't specifically say cycles</p>
<p>i think it was choice c though</p>
<p>What about the one that gave you 1.5 wavelengths of a wave, and asked what would happen if frequency doubled instantly? I think I just put 3 wavelengths.</p>
<p>for the leaf one wouldn't rod be positve so that it would attrack more negative charges from the leaves to the top of the metal ball think, forcing greater positive charge in both leaves and greater repalation</p>
<p>uni78- your explanation sounds right, even though I put negative.</p>
<p>what did you guys put for the latent heat graph?</p>
<p>was it </p>
<ol>
<li><p>A's greater</p></li>
<li><p>A's less</p></li>
<li><p>can't be determined w/o knowing mass ?</p></li>
</ol>
<p>what were the latent heat questions exactly (were they the first 4 on the test)?</p>
<p>The one that had a higher slope needed less energy for its temp to rise, so it had a smaller specific heat. I can't remember the questions either.</p>
<p>it was questions followed by a graph.
i don't remember 1 but
2. heat it takes for A to melt completely compared to B
3. specific heat of A</p>
<p>but since specific heat is heat that takes for 1g to raise 1'C don't you have to know the mass to calculate?</p>
<p>I think it said that they were equal masses being supplied the same amount of heat, right? So if they are the same mass it doesn't matter.</p>
<p>I can't remember the third question that well but the first 2 were both A</p>
<p>What was the answer to the extendable tube ones?</p>
<p>i'm sorry but for the einstein one, the second question was what did the scientists before einstein know right?</p>
<p>and the answer was just I.length/time are absolute, not II. laws of physics??</p>
<p>but.. why not laws of physics?</p>
<p>I picked II and III for the first one, and then I and II. The first postulate of the theory of relativity wasn't unique to Einstein's hypothesis...it was only the speed of light part that was!</p>
<p>For the dielectric, the voltage DECREASES, because the dielectric creates an opposing electric field within the capacitor.</p>
<p>For the relativity one, I did II and III, and then I and II (because I don't believe the inertial reference frames was unique to Einstein's theory of relativity)</p>
<p>For the two parallel wires with currents in the same direction, what did people get?</p>
<p>Also, for the one that was asking what angle it had to be to get maximum friction, what did people put?</p>
<p>the max friction is when it is not tilted since friction force F= normal force * coeff of friction. Normal force is greatest when mg is completely opposite of Fn.</p>
<p>Wikipedia: "Einstein's theory generalized Galilean relativity from only mechanics to all laws of physics including electrodynamics."</p>
<p>Now, I don't remember whether choice II said ALL laws of physics apply.</p>
<p>For the circuit one, the voltage across the capacitor must equal the voltage across the battery so the voltage does not change.</p>
<p>With currents in same direction, there is an attractive force.</p>
<p>Maximum frictional force is caused by static friction which occurs right before the object slips.</p>