haruspex's latest activity
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haruspex replied to the thread Distance between a Clock's hands when the distance is increasing most rapidly.Either will do in principle, but I think it is more obvious if you take the longer hand as stationary. The tip of the shorter hand can... -
haruspex replied to the thread Distance between a Clock's hands when the distance is increasing most rapidly.Whoa, too much deference!☺️ Nothing to apologise for. My post #10 was wrong and I am glad you picked that up.
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haruspex reacted to 256bits's post in the thread Distance between a Clock's hands when the distance is increasing most rapidly with
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Reading the comments from the video, the obviousness seems to be not ensured. A mixup of, or distinction, between velocity and distance... -
haruspex replied to the thread Distance between a Clock's hands when the distance is increasing most rapidly.Yes, my wording was sloppy. Will edit. As stated in post #1 the intent is clear.
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haruspex replied to the thread Distance between a Clock's hands when the distance is increasing most rapidly.Yes, and that is the easiest way to solve it: take the minute hand as stationary. That makes it obvious when the relative velocity of...
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haruspex replied to the thread Distance between a Clock's hands when the distance is increasing most rapidly.Not that that makes any difference here.
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haruspex replied to the thread Distance between a Clock's hands when the distance is increasing most rapidly.Seems reasonable to me for an ideal clock. Why do you doubt it?
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haruspex replied to the thread Correct statement about random process of radioactive decay.My objection to the question is that C is only part of what it means. So yes, you can arrive at C by elimination of the offered...
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haruspex replied to the thread Bernoulli vs real life experiment.Agreed - I only said "according to the calculation". The pump can only generate a flow by raising pressure. However, once a...
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haruspex replied to the thread Which one is correct statement regarding lightning?.Yes: https://en.wikipedia.org/wiki/Electrostatic_induction#Induction_in_dielectric_objects
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haruspex replied to the thread Which one is correct statement regarding lightning?.Also known as induction.
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haruspex replied to the thread Bernoulli vs real life experiment.My guess is that there is some head of water providing pressure and the pump merely circulates the water at the bottom in some...
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haruspex replied to the thread Use greedy vertex coloring algorithm to prove the upper bound of χ.The trick is to handle the vertices in the right order. Which vertices will be the most problematic? Deal with those first.
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haruspex replied to the thread Cone on horizontal surface.As in post #7? Am I missing something?
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haruspex replied to the thread Cone on horizontal surface.So apply ##\vec F=m\vec a## and consider what can produce that ##\vec F##. No, I meant with the apex of the cone at the centre of the...