GiorgioPastore's latest activity
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GGiorgioPastore reacted to SiennaTheGr8's post in the thread Undergrad Question about special relativity and magnetism with
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I think it's worth mentioning that this statement isn't true. The "electricity + length-contraction = magnetism" concept works for some... -
GGiorgioPastore reacted to Filip Larsen's post in the thread High School Good drawing of Earth's orbit for model? Possibly vector file? with Like.
Wikipedia's page on Earth's orbit has a nice drawing that might aide in that assessment...
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GGiorgioPastore replied to the thread High School Tennis Balls in the Ocean.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...
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GGiorgioPastore replied to the thread High School Tennis Balls in the Ocean.Then you are assuming that the balls are completely submerged in water. That would be a simpler case. But with tennis balls, they are...
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GGiorgioPastore replied to the thread High School Tennis Balls in the Ocean.Archimedes' Principle gives the exact volume of water displaced by a submerged or partly submerged body. Where the displaced water goes...
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GGiorgioPastore replied to the thread High School Tennis Balls in the Ocean.You should take into account that this is just an approximation for the height change. A more accurate calculation should account for...
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GGiorgioPastore replied to the thread Graduate Musing on the Foundations of Statistical Mechanics.Not exactly. The statistical mechanics entropy is explicitly defined for finite-size systems. The properties of thermodynamic entropy...
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GGiorgioPastore replied to the thread Undergrad Landau Mechanics Chapter 2 Problem 1: Direction of Potential Energy?.Although calling the Dirac delta "distribution" is quite widespread in the Physics community, I prefer to call it a generalized...
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GGiorgioPastore replied to the thread Undergrad Landau Mechanics Chapter 2 Problem 1: Direction of Potential Energy?.From my post, you can obtain the quantitative relation between ##v_1## and ##v_2##. Without that, it is impossible to say whether...
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GGiorgioPastore replied to the thread Undergrad Landau Mechanics Chapter 2 Problem 1: Direction of Potential Energy?.A possible schematization for this problem is the x-dependent three-dimensional potential function $$...
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GGiorgioPastore replied to the thread Graduate Why is 0 K unattainable?.Do you mean at T=0 K? In such a case, I agree. But this just says that the only possible state of a system in equilibrium with a...
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GGiorgioPastore replied to the thread Graduate Why is 0 K unattainable?.If the 3rd law is stated as "the zero temperature cannot be attained", I agree: it is trivially related to the fact that the "laws" are...