This new video from the slow-mo guys captures the explosion of an apple when it is rotated really fast (roughly $109$ rotations per second). But can someone explain me why did it explode? Can we explain this on the basis of centrifugal force (from the apple's frame)? If yes, what would be the cau...

Stay in a cold closed room, turn on a fan directed at you, it makes you feel colder instead of warmer. why? Here is the definition of heat: Matter exists in different physical forms – solids, liquids and gases. All matter is made of tiny particles called atoms, molecules and ions. These tiny par...

suppose that I send my twin away from the earth at 87% the speed of light. From the time dilation equation, since the twin is moving, the time interval between any 2 events, as measured by me, would be greater for the twin than me. 1) Does this mean that if I observe the twin, he will appear in s...

Since, magnetic field is a vector quantity, two (or more) magnetic fields (when in close proximity) should influence their fields, according to the laws of vector. And by that logic, Ampere's circuital law shouldn't work. Here's how- So, according to Ampere's law, $$∮\mathbf{B}\cdot d\mathbf{l}=...

I learn physics myself and sorry if this is a very simple question Why is it that we can apply Bernoulli on above and below the plane even if the are not in the same streamline? Why do we ignore height difference when doing so? Any help whatsoever is highly appreciated.

This question and the comments and answers it received encouraged me to ask this question, although I know that there will be some people who think that this belongs in the math forum. But I think that this topic is more relevant to mathematical physicists than to pure mathematicians. Motivation:...