# udiboy

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bio website none location Mumbai, India age 17 member for 1 year, 8 months seen Apr 7 at 5:28 profile views 261

A student and enthusiastic programmer. Love learning Physics! And I make android apps as a hobby.

This will make a great and interesting site : Puzzling. Please follow it

Please support Mechanical Engineering. There are many questions on PhysicsSE site related to engineering, which do not get answered because they are off-topic.

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 Jul13 comment SMBC ball bouncing problem @fibonatic, I agree with you, the question should specify exactly what forces are being involved, or at least make it deductible from some data. As to the assumption that the velocity scales down by the same factor, the change in vertical velocity corresponds to the impulse $Ndt$ whereas the horizontal velocity change would correspond to the impluse $\mu Ndt$. How can we assume them to change by the same factor? Jul13 comment SMBC ball bouncing problem @redd.it, there is no force in the horizontal to do work and dissipate energy(because I assume friction to be zero). Jul13 answered SMBC ball bouncing problem Jul13 comment How do ice spikes form? @PhilipGibbs I thought the ice would firmly stick to the walls of the container due to normal forces resulting from sideways expansion, which happens AFTER a complete lump of ice has formed. Are the ice-container bonds strong enough to keep it in place without that happening? Jul13 comment How do ice spikes form? why wouldn't it push the already frozen ice upwards? Jul13 revised Can we extract all the physics from the line element only? (i.e.) without any knowledge of coordinate system? SpellCheck Jul13 comment How can you weigh your own head in an accurate way? "No need for the $\approx$ sign"... hahaha. +1 for that. But I think Hooke's Method is actually possible, if you consider the skin and neck muscles loose enough, and can somehow find out an average value of stiffness of the human spine. Jul13 suggested suggested edit on Can we extract all the physics from the line element only? (i.e.) without any knowledge of coordinate system? Jul13 comment Is it possible for information to be transmitted faster than light by using a rigid pole? @Shaktyai , check out this MinutePhysics video, which explains exactly the same paradox you state : youtube.com/… Jul12 comment Vectors with more than 3 components You could think of a 4D vector as one connecting two points which are both spacially, and temporaly seperated. For eg. a vector joining $(0,2,3,t=0s)$ to $(2,4,5,t=2s)$. But it is quite difficult to represent this as a diagram. Jul12 comment What is the proof that a force applied on a rigid body will cause it to rotate around its center of mass? I agree with @Gugg. If the body is rotating, every point will have an acceleration of $\omega^2r$ towards the instantaneous axis of rotation. It is truly not constant for all points on the rigid body. Jul12 revised Why is electric flux defined as $\Phi = E \cdot S$? added 12 characters in body Jul12 comment Difference between Eulerian and Lagrangian formulation of Fluid Dynamics You derived your formula for a fixed volume, i.e. $\Delta x, \Delta y, \Delta z$ do not change with time. But in that textbook derivation you provided, they have not considered them fixed. That's why those $v_x,v_y,v_z$ terms. Put them as $0$ and it turns into the same equation you got. Jul12 revised Double Slit experiment with just one photon or electron Linked to video Jul12 suggested suggested edit on Double Slit experiment with just one photon or electron Jul12 revised What do we mean when we say the QM wave function is a section of the $U(1)$ bundle? Formatting Jul12 revised A few questions related to frame dragging Formatting Jul12 reviewed No Action Needed Calculate force of impact on running dog Jul12 reviewed Reviewed A few questions related to frame dragging Jul12 suggested suggested edit on A few questions related to frame dragging