<p>there were a lot of unnecessary parts that were on the test, for example antimatter (yes, it is physics not not in the curriculum), sig fig multiplication and guessing (this is part of chemistry). but then again, those people who say physics contains chemistry…</p>
<p>@Meburi: so capacitance = charge/voltage.</p>
<p>current = charge/time, which means:</p>
<p>charge = current x time</p>
<p>So, capacitance = (current x time)/voltage, which means:</p>
<p>voltage = (current x time)/capacitance!</p>
<p>Positrons being antimatter seemed like common knowledge to me… My physics class barely did quantum and I feel like I got all the quantum ones.</p>
<p>updated consolidated list</p>
<ol>
<li>24N for the elevator</li>
<li>Rotating drum experiment tests = speed</li>
<li>1 and 4 most current</li>
<li>2 and 5 least current</li>
<li>E = blv, so I II and III for moving rod in mag. field</li>
<li>Heat is added and temperature increases</li>
<li>Convex mirror, Virtual only</li>
<li>Convex lens, I II and III, virtual, real bigger, real smaller</li>
<li>5 and 6 1/2 for the pond</li>
<li>decrease length of string to decrease period of pendulum</li>
<li>Sphere has positive charge, electroscope problem</li>
<li>car decelerating, given time to decelerate, can find I II III</li>
<li>momentum ball 1kg is moving at 4 m/s</li>
<li>heaviest student walking up the stairs</li>
<li>positron anti matter</li>
<li>neutron heaviest particle</li>
<li>polarization for light v. sound</li>
<li>bird seems like its higher to the diver</li>
<li>110^-13 electron -> energy</li>
<li>acceleration is a/9</li>
<li>bring charge from q to 4q</li>
<li>ball falling has gravity down, friction up</li>
<li>covering bottom of converging lens = full image shown</li>
<li>ONLY moving magnet towards coil and moving the magnet and coil
towards each other provides emf</li>
<li>area under F v. t graph is change in momentum</li>
<li>block sliding down frictionless: constant acceleration,
constant direction, constant angle</li>
<li>uniform circular satellite: constant acceleration, changing
direction, constant angle</li>
<li>nuclear physics is rutherfords alpha particle gold foil
experiment</li>
<li>4.010^-16 not sure if this is exact number, for the E=hf</li>
<li>reason higher frequency is heard due to doppler effect is that
motion of van changes wavelength</li>
<li>force between two wires of current flowing dependent on
magnitude of currents, seperation distance, and length, so I II III</li>
<li>E field going west</li>
<li>negative particle moves east</li>
<li>double velocity of particle doubles magnetic force</li>
<li>inelastic collision is the balls sticking together</li>
<li>ball lands 2m away</li>
<li>plastic cup heat transfer 3W</li>
<li>temperature reading 76.0 Celcius</li>
<li>sig digs multiplaction, 21.0</li>
<li>potential energy greater than kinetic energy, 1000m or 50 m/s</li>
<li>2V drop along the capacitor</li>
</ol>
<p>I disagree about the plane problem, since once he leaves the plane, he is not moving at 50 m/s
Think about dropping a can outside you’re car window when you’re driving. The can only has potential energy and no kinetic energy( the can would not have any speed the moment it leaves your hand)</p>
<p>Your* not you’re</p>
<p>when the ball is in the plane, is it moving relative to the plane? no. but the plane is moving at 50m/s, so the ball must be moving at 50m/s also or the plane will move away due to faster velocity.</p>
<p>so when you drop the ball, it has its own velocity of 50 m/s</p>
<p>The key is that we are thinking of the energy relative to the ground. Relative to the plane, the man has zero speed, but relative to the ground he has the same speed that the plane has relative to the ground (50). The potential energy must also be measured in the same reference frame, relative to the ground.</p>
<p>I feel like 800 is about 7 wrong?</p>
<p>nope 12 wrong</p>
<p>12 incorrect questions or just -12?</p>
<p>75 - 12 - 12/4 = 60</p>
<p>so yea 12 incorrect questions</p>
<p>Sparknotes curve says 66 is the minimum for an 800</p>
<p>Yeah I put all potential energy for the plane but it’s not right. The person has velocity when leaving the plane in the direction he was going in.</p>
<p>The PE is greater than the KE.</p>
<p>PE = mgh = m(10m/s^2)(1000m) = 10000<em>m
KE = 1/2mv^2 = 1/2m(50m/s)^2 = 1250</em>m</p>
<p>do we really need to discuss this question any more…let’s move on.</p>
<p>Why not? If someone doesn’t understand the problem, what’s wrong with explaining it?</p>
<p>can’t really answer to that…I just wanted to move on to more questions. sorry</p>
<p>Yeah man what’s your problem bro.</p>
<p>Yeah honestly think about it though. If you dropped a can out the window, would it just straight up hit the road and stop? Nope, it would start rolling because of conservation of momentum. In the plane the guy had momentum (mv) and so when he jumped out, he still had the momentum (Newton’s second law). Waddup</p>