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wizzkids's latest activity
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wizzkids replied to the thread Does anyone have resources for photoelectric depth study?.Now I know it is a bit hard for high school students to obtain apparatus for a first-hand investigation. Your research can be a... -
wizzkids replied to the thread Does anyone have resources for photoelectric depth study?.To gain a solid understanding of the evidence for the photoelectric effect, I recommend students watch this video. It's an oldie but a...
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wizzkids replied to the thread Spectroscopy.Yes there is. Go to https://pubchem.ncbi.nlm.nih.gov/ The Published Chemistry Database of the National Library of Medicine. From there...
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wizzkids replied to the thread Control tests are wrong.Don't be too disappointed if you discovered your control specimen was contaminated or behaved in some what that you did not anticipate...
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wizzkids replied to the thread Interference Questions.That is correct. The answer is an irrational number, but in an exam you have to choose the closest option which is (C).
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wizzkids replied to the thread A question about the justification behind the solution of a problem..Actually in the solution it would have been quicker to state the law of triangles, sum of the interior angles must be 180o and therefore...
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wizzkids replied to the thread physics problem.The free-body diagram has three vectors as shown below.
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wizzkids replied to the thread Interference Questions.This is the Double Slit Experiment. Go look up the Physics formula sheet and you will find a formula that links the positions of...
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wizzkids replied to the thread Hypothesis?.Yes, the hypothesis needs to be in there, otherwise what are you investigating? Your hypothesis creates the inquiry question, and your...
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wizzkids replied to the thread Why is not A?.I chose my point of reference as the top of the cliff, so distances are measured from the top of the cliff.
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wizzkids replied to the thread Why is not A?.@kkk579 The answer given in the paper is wrong, btw. There is nothing fundamentally wrong with your calculation, but there is no need...
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wizzkids replied to the thread Why is not A?.Yes, you could do the calculation that way. If the object has half it's final velocity then it has a quarter of its final kinetic...
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wizzkids replied to the thread Why is not A?.@kkk579 In question 6 (c) you performed a calculation based on energy. The correct way to calculate the height is to use v2 =u2 +2as...
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wizzkids replied to the thread Why is not A?.Question 15 (a) is also badly worded. I think what the examiner meant to say was, "Draw the force-vector diagram at the point Y." If you...
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wizzkids replied to the thread Why is not A?.There is no correct answer. All the options are false. The best way to analyse this force-time graph is to recognise that the area...
