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Why we choose constant $T$ and $P$ for the definition of partial molar quantity? It might be not a physics question, rather, a philosophic question though. For a...
Asked on 01/20/2021 by Youhwan Jo
0 answerAfter the inflationary era the Universe became radiation dominated. The era of radiation domination is defined as the phase during which the temperature of the Universe was so high that...
Asked on 01/20/2021
3 answerIf there are two identical lenses L1 and L2 but made with different materials such that refractive index of one is greater than the other (Say for L1 = 1.33...
Asked on 01/19/2021 by Utkarsh Sharma
1 answerIf an equal torque of equal radius and size is produced on two bodies of the same weight and same center of gravity, but with different weight distribution (say one...
Asked on 01/19/2021
1 answerI am trying to show the following commutation relation for the Dirac matrices $gamma^mu$ and the metric $eta^{nulambda}$: $$2[gamma^mu,eta^{nulambda}I]=0$$where $I$ is the 4x4 identity matrix...
Asked on 01/19/2021
0 answerI want to derive a cross section for objects falling into a potential (such as a $U(r) = -1/r^n$ potential). I defined the total “falling onto” cross section ...
Asked on 01/19/2021 by user758469
0 answerI have a case where my camera is trying to move at a certain velocity in a fixed direction. All the time, it is moving parallel to a line (the...
Asked on 01/19/2021
0 answerHow can we calculate the elongation of a rotating string with a mass attached to it? We know, that the mass has a velocity of v and the other end...
Asked on 01/19/2021
1 answerI was just wondering what it would be like if there was a car moving forwards with some velocity in vaccum and someone was to shine a flashlight inside the...
Asked on 01/19/2021
2 answerI always notice this weird thing and try to overcome it but cant. As shown in the image when I ride the bike by just one hand and pull the...
Asked on 01/19/2021 by Deiknymi
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