I have noticed that whenever you buy franks (frankfurters), they come in the package straight. But whenever I boil them in water, they get wavy shaped. I believe the world is fundamentally quantum, so this should have something to do with wave nature of matter:), but I am happy with any kind of e...

I was watching this YouTube lecture, and earlier in the vid he mentions 120 volts from a power outlet would kill you. So if human resistance is $300\ \Omega$, $0.4$ A should be enough to do the job. Then he proceeds to touch a higher voltage of $200,000$ V and says its because the current flowing...

We often calculate the velocity of a boat moving upstream as the (velocity of boat in still water$-$velocity of stream), and add them for downstream. My teacher told me that it's "net velocity" of a body, but can someone prove mathematically that net velocity is the sum of all the velocities acti...