<p>i put a i think for the one with the wire? it was going to the left i think</p>
<p>i said he couldnt see his knees but he could see more as he backed up</p>
<p>also the one where you guys put diffraction, do you remember the other choices? i want to say i said all of them… i think i remember it being diffraction interference and something else, and its a constructive interference from the diffraction thats causing the bright spot</p>
<p>If I remember correctly, interference, diffraction, refraction, reflection, and something else.</p>
<p>ohh i was gonna say that was just a I, II, and III question, and i was thinking it was interference, diffraction, and refraction? but i might be mixing up questions</p>
<p>Can we come up with a consolidated list of solutions?</p>
<p>we could but we’ve only discussed like 5 questions lol</p>
<p>what quantities were needed to figure out how far the string would stretch when the block moved into it. also a similar question what quantity needed to be measured to figure out the height of the room?</p>
<p>Time to bring up a few more questions then :P</p>
<p>The wave propagating in a circle around the source. What properties of the wave included for measurement.</p>
<p>Something that relates heat input with the temperature rise per unit mass of substance. I thought it was specific heat.</p>
<p>For the heat engine in which Q1 is the input heat and Q2 is the waste heat, I thought W = Q1 - Q2</p>
<p>As for question after that about the efficiency of the engine (I believe the numbers were Q1 = 4800 and W = 1200). I put 25%</p>
<p>For the mud balls sticking together, I put that temperature is increased. (Probably wrong, as I didn’t have time to thoroughly analyze it)</p>
<p>For the problem with 2 coils of wire, 1 connected to an ammeter and another to a power source, the meter reading shouldn’t change when the other coil is at rest and the current is constant.</p>
<p>The number of electrons in a neutral atom is equal to BOTH atomic number and number of protons.</p>
<p>The second law of thermodynamics is that entropy has a tendency to increase. I didn’t answer that one.</p>
<p>For the questions about a chart of a sliding block’s position and time, I put that there is negligible friction at first and then constant friction.</p>
<p>For the balloon with a rising force of 1200 newtons and rope tension of 1300, the force of the wind is 500.</p>
<p>For the question about the speed of the airplane 200 km/h east relative to a win that’s 90 km/h south, I put 220 km/h ground speed.</p>
<p>Anyone remember what the last question was?</p>
<p>As for the height of the room, I put the time that it takes the ball to do one cycle, or the period.</p>
<p>Yea I put that too!
Apparently, the answer is in the formula of SHM pendulum T=2pi rad (Length/gravity), ugh…</p>
<p>What was the answer to which one results from energy being quantized for electron: alpha dcay, isotopes, line spectra?
Can someone explain the principle behind the fiber optics one, and also the white prism with same speed one?</p>
<p>if a light of wavelength something is projected through a slit that’s much narrower, we can expect a wide range because of diffraction?</p>
<p>for a truck colliding with a car, what do we have to know? I said all 3.</p>
<p>For the fiber optics question, it’s total internal reflection.</p>
<p>The for the truck and car question, I put all three. Can other people verify this as well?</p>
<p>And for the wavelength being projected through a slit that’s much narrower, I put diffraction.</p>
<p>
</p>
<p>I don’t remember having the first question. 0.o</p>
<p>wouldnt constant friction cause the thing to deccelerate uniformly?
the difference between successive distances was 1 less each time
and what graph can show a moving object with zero force?</p>
<p>i can’t remember whether I put the linear line or a portion of a concave down parabola</p>
<p>i agree with most of bravos answers^
i wanna say i put all three for the one with the wave in a circle but im not sure
i wasnt sure about the relative one i guessed 90 but thats prob wrong
everything else i agree</p>
<p>the one with the slit was diffraction
i also put all three for the car and the truck</p>
<p>also in a velocity vs time graph under constant force, is it just an increasing straight line?</p>
<p>Anyone put 37 for the counts/min?</p>
<p>i think the spherical waves’ choices were frequency wavelength and intensity
and it asked which of the 3 can vary with distance from the source</p>
<p>I put wavelength because of the lambda/d equation, while frequency and intensity can’t vary once they leave the source</p>
<p>i could be wrong though?</p>
<p>actually, im pretty sure the one with the slit wasnt asking for diffraction? wasn’t it that the waves would like spread out after it went through the slit or something like that?</p>
<p>For the maximum speed, I put we need the initial kinetic energy of block is set to equal to the 1/2 kA^2 equation, or the max potential energy of spring.</p>
<p>dasheeky, i’m not sure… doppler effect is an apparent change in frequency but it doesnt actually change?</p>
<p>shellpell that was what i put^</p>