TSny's latest activity
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TSny reacted to mmfiizik's post in the thread Two-layer dielectric, four-capacitor model vs three-capacitor model with
Like.
Thank you all for explanations. I tried to prove this to myself by contradiction, but it might be an oversimplification. If we assume... -
TSny replied to the thread Chain falling out of a horizontal tube onto a table.Very good. I'm glad I could help.
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TSny reacted to haruspex's post in the thread Chain falling out of a horizontal tube onto a table with Like.
You may have misunderstood what @TSny was asking, which was to write an expression for ##dt## in terms of ##dK##. And you have that, in...
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TSny replied to the thread Chain falling out of a horizontal tube onto a table.Your result ##-\frac 1 2 \lambda v^3## is correct for the rate at which KE is lost to heat at point B. I’m not sure of your thought...
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TSny replied to the thread Is it possible for a vertical rod balancing on a table to lose contact by striking the top of the rod?.Yes Rigidity imposes a condition on the velocities of two points of the rod, not the accelerations.
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TSny reacted to mjc123's post in the thread Two-layer dielectric, four-capacitor model vs three-capacitor model with Like.
I think you are right. The book solution implicitly assumes that the voltage at the bottom of slab 1 is constant across the width, which...
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TSny replied to the thread Chain falling out of a horizontal tube onto a table.Good. Ok. This is less of an eyesore if you write it as ##U = U_0 -\lambda ghx##, where ##U_0## is the total potential energy at the...
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TSny replied to the thread Chain falling out of a horizontal tube onto a table.As pointed out by @Steve4Physics, mechanical energy is not conserved. However, you can still solve it using energy concepts. (1) Find...
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TSny replied to the thread Falling capacitor connected to constant voltage.Yes, they correctly accounted for gravity. But, they did not account for the change in chemical energy ##U_{chem}## of the battery...
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TSny replied to the thread Falling capacitor connected to constant voltage.Your two methods look correct. I did catch a spot where you have two compensating errors: Check the signs in this calculation...
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TSny replied to the thread High School Using energy principles to find equilibrium depth of floating object.Yes. Nice analogy.
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TSny reacted to sophiecentaur's post in the thread High School Using energy principles to find equilibrium depth of floating object with Like.
We're in the same neck of the woods as where there's an apparent paradox with the energy before and after a charged capacitor is...
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TSny reacted to acemoonbeam1's post in the thread Where Can Teachers Access and Collect Classic PSSC Physics Films from the 1960s? with Like.
A number of teachers have been interested in collecting the black and white films that were part of the PSSC program in the 1960s. Many...
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TSny replied to the thread Help with derivation of electric field of a moving charge.Good. If you wish, you can post your work for ##\nabla \mu## and we can review it.
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TSny replied to the thread High School Using energy principles to find equilibrium depth of floating object.If you release the block from rest at the position where it starts to submerge, then the only two forces doing work as the block...
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