7
votes
1answer
498 views

Why doesn't a bus blow due to internal pressure?

When one travels in a bus, if he's sitting at any window, he will feel that the air is coming inside. If someone is standing at the open door of the bus, he'll also feel that the air is coming ...
0
votes
0answers
58 views

Hypersonic collisions: how to understand

Preliminary: I'm not good with tensor calculus, but it's okay for me to work with reasonably complex differential equations. What I need is understanding of process of high speed (5-500 km/s) ...
5
votes
1answer
504 views

Why and how is sound produced when two objects hit each other?

When two objects collide and undergo a partially inelastic collision (so every one we experience in every-day life), they rebound to a certain degree, but kinetic energy is not conserved. Thus, the ...