<p>I think water’s boiling on D , because in E, it’s already a gas.
Oh and you need to decrease the length of the pendulum to decrease period.
The E=mc² had a strange solution though. I calculated it, and it didn’t seem to match any of the choices offered? Circled closest one…</p>
<p>More answers:</p>
<p>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</p>
<p>Boiling was interval D. You add all the energy but the temperature won’t increase. That’s because it boils at 100 C so it won’t increase more.</p>
<p>Also, I think pulley was .8, but I don’t remember why or what I chose. If you remember the problem, I can go through it though.</p>
<p>Dakilica, I dont agree with the theta and vo one. You need to increase vo, but you dont know if you need to either increase or decrease theta. Thus, you should keep theta unchanged. 45 degrees optimizes the distance. </p>
<p>I agree with the emf one</p>
<p>I disagree with the acceleration due to gravity. Acceleration due to gravity on the surface is independent of the other planets attraction. I.E. the sun’s attraction on Earth. Thus, since the masses of both planets are the same, the acceleration due to gravity should also be the same.</p>
<p>yeah i put something like 10^13 for the E=MC^2 one</p>
<p>battery of unknown emf, wire coil one: you need an ammeter and a voltmeter to find resistance of the coil (?)</p>
<p>The group of students climbing the stairs - the heaviest? mgh?</p>
<p>The group of students climbing stairs, - the heaviest (because of mgh?)?
The PV=nrT question (the amount of Q will increase, and T will increase?) i cant remember exactly how it sounded?</p>
<p>Climbing stairs -heaviest
10 to the power of -13 for the E = mc^2 one
ammeter and voltmeter</p>
<p>yeah t increases</p>
<p>I also got the heaviest.</p>
<p>Theta does not necessarily need to increase/decrease. The correct answer is increase V.</p>
<p>Gravity also depends on distance, or R, and it’s an inverse square ratio. 1/9 is definitely correct.</p>
<p>I still think you need to decrease theta because d is actually displacement in x direction only, so you need to decrease theta so that your x component of speed increases (it’s made out of a y and x component) …
It didn’t say attraction of planets, it just said that if one planet had acceleration a due to ma= G mM / r² , what would be a on another planet which also had m, but also had 3r…
m (of a random object) cancels out, so all you have is a, r and M … Hence , 1/9 *a</p>
<p>i disagree about the gravity one. mass also changes if R is 1/3 as long. it ends up being g is linearly related to radius, so it should be 1/3</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</p>
<p>neutron: heaviest
convex mirror virtual image i think
for converging lens: real image that can be bigger or smaller than the object?</p>
<p>Why wouldn’t it be 9g? The planet is three times as massive - should its acceleration due to gravity not be greater?</p>
<p>1finite, I agree with all of your answers</p>
<p>radius changes, not mass</p>
<p>Boiling water is being disputed.</p>
<p>Also, if I recall the question, it was two planets, we’ll say X and Y. Same mass, but planet X has a radius of 1/3 that of mass Y. What is the pull of gravity on the surface of planet X compared to that of planet Y.</p>
<p>So it would be 3A, maybe they wanted the one with the 3x radius, but either way, it’s an inverse square of whatever number they gave you because it was from the surface.</p>
<p>ahh oops, i didn’t realize it said same mass :/</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
Convex mirror: virtual image
Convex lense: real image both small and big</p>
<p>Disputed questions:</p>
<p>acceleration due to gravity</p>