Recent content by sr_philosophy

no! i wish i had a figure to explain things better!

Who told you i didn't know the formula? its not enough if you just know the formula... snell's law applies only for a pair of media... if you didn't know!

no no! if u look back at the history, the formula was derived after they knew that the angles were equal. That is not a hint. Sorry.

Sir. That's exactly what i have done above except that i have not used the symbols that you have.

Consider a ball rolling on a horizontal plane where friction is present. The forces acting on the ball are mg, friction at the contact and the normal force. This friction acts opposite to the direction of velocity. That should provide a clockwise torque and hence increase the angular velocity of...

Consider a ray of light in air traveling towards a medium 1 and then subsequently to a medium 2 and then back to air again undergoes refraction at every pair of media. Let us say that the initial incident angle between air and medium 1 is 'i'. What law states that the emergent ray at then end...

Let us take a simple example. There is a body of mass 'm' Kg which experiences a force that is a linear function of time, F=kt acting in the direction of motion. Let us try to calculate the Work done by the force in a time 'T'. Final Velocity 'v'= integral {(from 0 to T) of [F/m dt]}. Hence work...

Do you think that's a real satisfactory explanation?!? Why not try a quantitative analysis? Let the ink filler be of length 'L' and let us dip it such that the rubber just stays out of the ink. So the tip of the filler is at a depth 'L'. Let us now assume that we have dipped it normally, i.e...

ofcourse! i meant let's have a detailed explanation of the physics behind it.

Basic question - How does an rubber ink filler work? (I don't want answers like - there is a vacuum created thus ink fills space and thus... Thats not Physics) Extending discussion : Is it better to press the rubber then dip and then suck and remove. OR To dip then press and suck and remove?

What is temperature?

what force do you think causes the pressure-or-whatever u say? Pressure...?

yes... what do you think a weighing machine reads?

You are in a car and there is a pendulum suspended in front of you. You have no idea of what is going outside, i.e., you are completely blind from the surroundings. You can see only the pendulum and the interior of the car which has nothing else. You find that the pendulum is at the beginning...

Can anyone comment on the reaction force to the centrifugal force?