haruspex's latest activity
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haruspex replied to the thread SHM amplitude and angular frequency from velocity equations.Your work looks correct, but you might be penalised for quoting too many significant figures in your answers. Given a value like... -
haruspex replied to the thread Solving an elementary trigonometric equation.Yes, but the question in post #1 is where is the error in the method. I answered that in post #2 (a sign error).
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haruspex replied to the thread Solving an elementary trigonometric equation.I agree, but… That’s not what I get at n=1.
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haruspex replied to the thread Undergrad Heat radiation in vacuum.It's how they interpret "heat flows from the hotter to the colder".
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haruspex replied to the thread Undergrad Heat radiation in vacuum.It's a misunderstanding of the second law of thermodynamics.
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haruspex replied to the thread Undergrad Heat radiation in vacuum.I prefer to describe that as being because there is less radiative gain from the sky. The outgoing radiation is the same. Yes, I know...
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haruspex reacted to GiorgioPastore's post in the thread High School Tennis Balls in the Ocean with
Like.
Now I see my mistake. I was considering the change of level from the bottom of the submerged object. In such a case, objects with the... -
haruspex replied to the thread High School Tennis Balls in the Ocean.No, it does not make that assumption. I am defining H to be the height of the water above the base B of the ball. The top of the ball...
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haruspex replied to the thread High School Tennis Balls in the Ocean.Read post #15 carefully. The argument goes like this: With a ball floating inside its hexagonal prism, there are three regions of...
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haruspex replied to the thread High School Tennis Balls in the Ocean.It is not an approximation. Archimedes' Principle is exact and depends only on the volume, not details of the shape.
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haruspex replied to the thread Undergrad The countability paradox of computable numbers.Have we? How does the algorithm generate the list, to the required length, as needed?
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haruspex replied to the thread Graduate A rotating frame equation for the "carousel experiment".Except when the object is, instantaneously, at the rotation axis?
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haruspex replied to the thread High School Tennis Balls in the Ocean.Apologies - I misread your method. It’s fine, and it is the same as in post #1.
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haruspex replied to the thread Graduate A rotating frame equation for the "carousel experiment".https://en.wikipedia.org/wiki/Coriolis_force lays it all out very clearly. Correctly describing the motion in a rotating reference...
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haruspex replied to the thread High School Tennis Balls in the Ocean.Not so fast. Consider e.g. if instead they were almost the same density as the water, also hexagonal in section and 1m tall. (Btw, not...