<p>Interesting questions towards the beginning of the test, when it asked for the forces acting on an object sliding down an incline with friction. Yes, there was a component of gravity, and yes, there was friction, but was there a resistive force made by the air? I took the “still air” as meant to be “no” but there was another question just like it and that threw me off.</p>
<p>Still air still produces a drag force.</p>
<p>Did you put vertical spring and water tank for the graph displaying vertical displacement as a function of time?</p>
<p>Yeah that’s what I thought but I wasn’t sure what they meant by “still air.” </p>
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<p>That’s really annoying. </p>
<p>Anyways, I put down 3/4 for the wavelength…seemed kind of a simple question, but I didn’t really read much into it.</p>
<p>EDIT: Yes, buoyancy does produce a bobbling effect on the sine/cos graph.</p>
<p>Undisputed answers so far:</p>
<p>antimatter question: positron
water is boiling: upper most straight part
Index of refraction: sin 60 / 1.5
Given initial velocity, mass, and stopping time: 1, 2, and 3
Force x time = change in momentum
What led to the nuclear model: gold foil experiment
Skydiver jumping off of a plane: potential energy > kinetic energy
Throw ball a up and ball b down at same initial velocity. Whats the velocity of ball a: v (same as ball b)
Skydiver jumping off of a plane: potential energy > kinetic energy
Half covered lense: full object, but decreased intensity
Index of refraction is 4/3: wavelength is 3/4
Which waves will result in the least disturbance: 6 + (1/2)wavelength
Man is standing underneath water: only choice 1 (the bird and the tree appear to be higher than they actually are)
Particle question where you know the rotational speed of the giant ball with a slit in it: you can only find the speed of the particles
Students climbing stairs - heaviest one
Pv = nrt : t increases as q increases
Heaviest: neutron
Concave mirror: virtual image
Convex lense: real image both small and big
acceleration due to gravity: 1/9
Theta and initial velocity one: Just increase the initial velocity
Worker kicks the bucket: 2 m
Must be electrical field: point charge
Must be magnetic field: bar magnet
Ammeter question (based on drawing from ImageShack® - Online Photo and Video Hosting
Highest: 1 and 2
Lowest: 4 and 5
Vector direction for electric field: West
Vector direction for negative point charge: East
Mass of object in pulley problem: 1.2 Kg
Projectile: net force is constant, direction of net force is constant, angle of net force with path is changing
Object rotating around planet: net force is constant, direction of net force is changing, angle of net force with path is constant (always perpendicular to path)
Speed of light question: 10^-13 J
Traffic light question: All colors except red are absorbed
Piano question: wavelength and period both decrease
emf question with coil and battery: current is induced in all cases except when the coil and magnet have the same velocity
Firetruck question: Velocity of truck + velocity of sound in air
Velocity of puck after collision: 4 m/s
Elevator: 24 N
Wavelength question: 3/4 wavelengths
Graph displaying vertical displacement as a function of time: Vertical spring and water tank
Heat transfer question: 4 watts</p>
<p>Disputed questions:</p>
<p>None </p>
<p>Disputed questions:</p>
<p>None </p>
<p>Disputed questions:</p>
<p>None</p>
<p>Can someone confirm this list?</p>
<p>For the soccer ball projectile, was the given angle at 45? I don’t remember if it was.</p>
<p>There was no given angle… Is my list correct? Also, are there any other questions that you remember from the test?</p>
<p>Wait, then if there was no given angle, then how would you know to keep the angle constant? The angle could be <45, which means that angle must increase in order to increase distance covered.</p>
<p>Also, your list seems correct as far as I know. What about that temperature question where you had to give the most accurate reading of the temperature?</p>
<p>There was one soccer ball question where the angle was 60, and another where it was unknown. The answer for the “which of the following would guarantee the ball to travel further” problem was increasing the velocity.
EDIT: The angle wasn’t known for this problem, and the question asked what would guarantee an increase in distance that the ball traveled. I assume that you already know that 45 degrees is the optimum angle for a ball to travel the furthest distance. This being said, an increase in velocity is the only way to guarantee that the ball will go further. As Einstein said, “I can do a million experiments to try to prove something, but it only takes one to disprove it.” If the angle in the experiment was 20 degrees, then yes, increasing both the velocity and angle would make it go further. If it was however, 60 degrees, then increasing the angle would cause it to go less distance. Assuming that the angle parameters are 90 degrees and 0 degrees, then the only way to ensure that the ball will travel further is by increasing its velocity.</p>
<p>I wasn’t entirely sure about the position function, because in all reality, both the rippling effect and the spring would cause the sine curve to oscillate closer to the X-axis as x increased, but it was exactly the same on the second interval. I figured that they were implying that it was negligible though because otherwise there would be no answer. </p>
<p>By “still air”, the problem meant that air is present during the trial, thus causing air resistance to be a factor in the answer. </p>
<p>I was confused on the following question to that. I have no idea what the problem was, but one of the answers involved the mass retarding something. I think I put the option that included 1 and 2 but not 3, but I wasn’t sure what it meant. If it was asking if the mass of the object would affect the rate that the object fell and air resistance exits, then of course it would; but it sounded like the question was asking if a greater mass would cause an object to slow down in a fall (slow down verses change rate). Did anyone remember what this question was or what the answer was to it? </p>
<p>Revolution: May I request that you don’t update the answer list multiple times in one page? It seems to disparage the main conversation of the topic. Instead, could you just edit your previous post (on that page)?</p>
<p>
</p>
<p>I put that as well. </p>
<p>
</p>
<p>I think you’re reading too much into it. </p>
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</p>
<p>Normal users lose the ability to edit previous posts after a given amount of time.</p>
<p>OregonSenior,</p>
<p>I can’t edit my pervious posts because I am a normal user. </p>
<p>the answer to the mass retarding one was 1 and 2 but not 3</p>
<p>I got 70.0 for the temperature measurement one</p>
<p>Undisputed answers so far:</p>
<p>antimatter question: positron
water is boiling: upper most straight part
Index of refraction: sin 60 / 1.5
Given initial velocity, mass, and stopping time: 1, 2, and 3
Force x time = change in momentum
What led to the nuclear model: gold foil experiment
Skydiver jumping off of a plane: potential energy > kinetic energy
Throw ball a up and ball b down at same initial velocity. Whats the velocity of ball a: v (same as ball b)
Skydiver jumping off of a plane: potential energy > kinetic energy
Half covered lense: full object, but decreased intensity
Index of refraction is 4/3: wavelength is 3/4
Which waves will result in the least disturbance: 6 + (1/2)wavelength
Man is standing underneath water: only choice 1 (the bird and the tree appear to be higher than they actually are)
Particle question where you know the rotational speed of the giant ball with a slit in it: you can only find the speed of the particles
Students climbing stairs - heaviest one
Pv = nrt : t increases as q increases
Heaviest: neutron
Concave mirror: virtual image
Convex lense: real image both small and big
acceleration due to gravity: 1/9
Theta and initial velocity one: Just increase the initial velocity
Worker kicks the bucket: 2 m
Must be electrical field: point charge
Must be magnetic field: bar magnet
Ammeter question (based on drawing from ImageShack® - Online Photo and Video Hosting
Highest: 1 and 2
Lowest: 4 and 5
Vector direction for electric field: West
Vector direction for negative point charge: East
Mass of object in pulley problem: 1.2 Kg
Projectile: net force is constant, direction of net force is constant, angle of net force with path is changing
Object rotating around planet: net force is constant, direction of net force is changing, angle of net force with path is constant (always perpendicular to path)
Speed of light question: 10^-13 J
Traffic light question: All colors except red are absorbed
Piano question: wavelength and period both decrease
emf question with coil and battery: current is induced in all cases except when the coil and magnet have the same velocity
Firetruck question: Velocity of truck + velocity of sound in air
Velocity of puck after collision: 4 m/s
Elevator: 24 N
Wavelength question: 3/4 wavelengths
Graph displaying vertical displacement as a function of time: Vertical spring and rippling tank
Heat transfer question: 4 watts
Difference between sound waves and light waves: polarization
Mass falling through air: 1 and 2 are right, but 3 is wrong (Adding mass doesn’t ■■■■■■ its fall)</p>
<p>Disputed questions:</p>
<p>None</p>
<p>What was the elevator question? (not the answer)</p>
<p>Something along the lines of… there was a 20 kg object (on earth, presumably) that is in an elevator. The elevator then rises at a rate of 2 meters/second.</p>
<p>There was also a question on which of the following would be visible in a dark room: hot tungsten wire, hot iron, or uranium.</p>
<p>I assume you mean 2 kg, not 20 kg? And also accelerates, not rises?</p>
<p>i put the heated tungsten wire (think lightbulbs)</p>
<p>i also put 70.0 as the measurement</p>
<p>the other sig-fig one went out to two decimal places: _ <em>.019 –> _</em>. 02 or something like that</p>
<p>Oh, sorry. 20 Newtons, not kilograms, I think it was.</p>
<p>The visible in the dark one also threw me. I marked my answer as uranium though. I figured that they either expect us to know that there is some innate difference between tungsten and iron that would cause one to glow over the other (unlikely, as that would be more chemistry, right?) I also know that uranium is portrayed as a glowing, green rock. No guarantee though.</p>
<p>^I had something along these lines, except I figured uranium was radioactive and would give off something visible.</p>