DISCLAIMER: Gross/Obscene question ahead!!! Ok, that was awkward. I am really sorry if this is a bad question to ask. I couldn't think of any other way to ask it (I thought about "Why does a loose water carrying hose flap" first, but that was too hard to relate with); so here it goes. I was just ...

I am currently studying collisions from an online lecture and the teacher in it says that both perfectly elastic and perfectly inelastic collision are practically not possible. I am able to find the reason why elastic collisions are practically impossible that is because there is always some loss...

All resources on standing waves give the same explanation: waves are free to move in and out of the open end of a pipe and, therefore, this open end must be an antinode. This, of course, explains why standing waves can only form in pipes with length $(2n-1)λ$ where $n$ is an integer. This didn't ...

Assume I live in a location where at any time of day and any time of year, I need to heat my house. Assume further that I have a room with no windows. In this case, does it make sense for me to buy efficient light bulbs, considering that any inefficiency in converting electricity to visible light...