June 2008 - Physics

Test Preparation SAT Subject Test Preparation
61

<p>i agree w/ temp. ill start us off..</p>

<p>object is thrown vertically in air, max height is 20 m. what is its speed when it returns to the ground.</p>

<p>i got 20 m/s</p>

62

<p>ras: interference?</p>

63

<p>@ras22
I thought it was intereference...
The problem talked about "bright and dark fringe patterns"</p>

64

<p>i put interference too, but again, i am not too sure.</p>

65

<p>@giantsfan
I got that, too.</p>

66

<p>i got 20 m/S also.</p>

<p>i thought it was refraction because it went through a different medium...? i don't know if thats correct logic though</p>

<p>on the question with the moon and gravity, i said that you can throw the object six times as high</p>

<p>on the second group of questions on the first page, i put that
the alpha particle can capture two electrons to become a helium atom
the proton can serve as a hydrogen nucleus
the positron has the greatest mass to charge ratio** <-- this one i'm very unsure of?</p>

67

<p>what did you get for the one with 5 diagrams about a magnet and a magnetic field? it was like asking for direction of the lines.</p>

<p>positron is right.</p>

68

<p>I put the circular field lines around a straight wire. I thought the lens would refract and I didn't see how interference would apply to the situation, but I'm not sure.</p>

69

<p>i thought the circular field was going the wrong way...anyways, i skipped that question. about the moon question, i put 6...urm, it was a complete guess =X</p>

70

<p>yeah that circular field was going the wrong way so i didnt pick that -_-</p>

71

<p>it wasnt going the wrong way. The current was going down, so the fingers would curl clockwise</p>

72

<p>no the current was goin up...the positive was at the top so the current flows to the positive</p>

73

<p>yeah I fell into that trap too...somehow I thought the current is going up (the positive sign was on the top, so it should actually go down):(
also one of the earlier questions: which point on the wave is going up...
now I'm pretty sure it was B, but I choe D on the test...stupid me :(</p>

74

<p>was B the one at the top of the curve?</p>

75

<p>no, B should be the leftmost one at the equilibrium position, I think...</p>

76

<p>ooh nvm ppod ur right :D</p>

77

<p>I actually didn't feel that the test was too hard. I only skipped 3 but I know I missed a lot.</p>

<p>I probably got 680-750. If I got 750 I definitely won't retake.</p>

78

<p>wavvy: equilibrium position??</p>

79

<p>the direct current flows from positive to negative according to PR</p>

80

<p>ooh ic</p>

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