haruspex's latest activity
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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... -
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...
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haruspex replied to the thread Cone on horizontal surface.Do you have to do something about the contact points? I don’t understand the question. Yes. Can you answer my questions in post #3?
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haruspex replied to the thread Cone on horizontal surface.I assume the rotation rate is constant. What is the acceleration of the cone's mass centre? What do you deduce from that? Would it be...
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haruspex replied to the thread Chain falling out of a horizontal tube onto a table.I am sorry, but I am rather snowed now. I'll try to get back to this in a day or two.
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haruspex replied to the thread Modeling a graph that shows age in relation to depth of an ice sample.A smoother result can be had by interpolating with splines, e.g. cubic splines: https://en.wikipedia.org/wiki/Spline_interpolation
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haruspex replied to the thread Finding the number of ways to arrange identical balls in a circle (3 different colors).It isn't clear to me whether reflections are considered to be the same, e.g. is YRRBB the same as YBBRR? If so, there are only four.
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haruspex replied to the thread Chain falling out of a horizontal tube onto a table.Thinking about it some more, I have decided it is not helpful to describe it the way I did, with the ##\lambda v^2## being subtracted...
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haruspex replied to the thread Earthed plates confusion.Now I'm confused… you previously mentioned "indagate", an archaic but valid word meaning to investigate, from the Latin "indagare"...
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haruspex replied to the thread Chain falling out of a horizontal tube onto a table.The retardation force on the horizontal portion is not the only reason the tension reduces. Consider a massless string but with a mass...