<p>okay but for anyone that has the test #49 on 1993 is a killer</p>
<p>is B the answer?</p>
<p>yea but how did u get it</p>
<p>can u please explain</p>
<p>Relativity implies length contraction, so the length should decrease. Since the thing (I forgot what it is) is moving in the y dirction, the parallel block will contract in length, while the perpendicular one would not. (Actually its width would contract, but that's not stated in the question)</p>
<p>hey but relativity is no longer on the test right?</p>
<p>Hmm i don't know.</p>
<p>any other questions?</p>
<h1>65 for 1998</h1>
<p>haha im working on the 1993 right now.. bound to find weird questions..</p>
<p>actually can someone explain 51 from '98?</p>
<p>young slit diffraction</p>
<p>sin of angle =(3/5) so just plug into equation</p>
<p>d sin theta =m times lambda</p>
<p>can u explain #40 for 1993</p>
<p>ahh right so if you use the formula x~m<em>lamda</em>L/d then you would fall to the trap of selecting .20 ahhh tricky</p>
<p>the answer is 0.20</p>
<p>ah holdon im on 31 right now</p>
<p>o yea for 1993 can u explain #12 y is acceleration upwards</p>
<p>wait the answer is .20? AHH i saw the wrong anwer then ><</p>
<p>and as for 40, if the answer is C, it is because the speed of light is constant no matter what (the fundamental premise of Einstein's relativity.</p>
<p>lol o now i get it but how bout #12</p>
<p>y is acceleration upwards</p>
<p>any question?</p>