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!
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...
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?
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...