# experimentX

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 Nov30 comment Galilean transformation of wave equation Hi ... shouldn't $\frac{\partial }{\partial x'} = \frac{\partial }{\partial x} - \frac{1}{V}\frac{\partial }{\partial t}$?? could you elaborate why just $\frac{\partial}{\partial x} = \frac{\partial}{\partial x'}$ ?? Sep9 comment Investigation of a pendulum's period, problem creating equation to sum the dynamic velocity the $t=t(\theta)$ is itself an approximating function. Naturally i would expect and approximating function. Seems that it exists from equation $(31)$ in that paper. (+1) Sep9 comment Investigation of a pendulum's period, problem creating equation to sum the dynamic velocity i would like to know if inverse of this function $t = t(\theta)$ exist or not. Aug6 comment Why do rolling disc (coin) move in circular path? all right thanks!! Aug6 comment Why do rolling disc (coin) move in circular path? @Ankush The coin is moving in circle means it should be spinning ... with period equal to the period of circular motion. Aug6 comment Why do rolling disc (coin) move in circular path? $J$ is angular momentum. Aug6 comment Why do rolling disc (coin) move in circular path? @Ankush since the coin is moving in circle ... something must continuously change the direction of the coin (so that coin follows circular path). Aug6 comment Why do rolling disc (coin) move in circular path? wouldn't that torque be in out direction? please check update. Aug6 comment Why do rolling disc (coin) move in circular path? and thanks for response!! Aug6 comment Why do rolling disc (coin) move in circular path? shouldn't this kind of torque make the coin fall? ... it comes towards us. Aug6 comment Why do rolling disc (coin) move in circular path? could you elaborate a bit please? Aug5 comment Why do rolling disc (coin) move in circular path? can you elaborate your answer on Torque (for thinner disc)? Aug5 comment Is it possible to witness a circular rainbow? i have seen one around the sun ... sun at the center. Aug4 comment Why do rolling disc (coin) move in circular path? hold on ... i'm uploading another one Aug4 comment Why do rolling disc (coin) move in circular path? sorry ... i couldn't find the tool to rotate the disc earlier Aug4 comment Why do rolling disc (coin) move in circular path? can you tell me if the Torque I showed in the figure is right? Jul30 comment Why does a photograph of a face look like it is always watching you? I note gun in movie poster ... no matter through angle which I look ... it always looks it it's going to shoot me :D Jul12 comment Lennard-Jones potential - equilibrium $\vec F = -{d U \over dr } = 0$ Jul1 comment Solution to the Maxwell's equation yeah that's the only part i know!! ... how to get that $\vec E$ part Jun18 comment waves on water generated by a falling object I'm planning a simulation project .. I'm not in hurry!! We will discuss this later after my exam.