Gun Definition and 304 Threads

Kind of hard to have palaeo climate discussions here. Also hard to figure out where to start the thread with a new hypothesis, about what caused the extinction of the Mammoths. Biology? Theory development? or Earth. Since there is a lot of Earth changes going on I choose for the latter. BTW...

im having a hard time on this physics problem. i would appreciate it if you would provide the full solutions for this problem. thanks a lot. hint : projectile motion A artillery gun can fire shells at 100 m/s. It is mounted on top of a 300 m high hill. AT what 2 angles could it be...

Hi I'm trying to come up with an expression for the acceleration of the rod in Rail Gun. The conducting rod is free to slide on two parallel rails with negligible friction. At the right end of the rails, a voltage source of strength "V" in series with a resistor of resistance "R" makes a...

Electricity is the movement of electrons from attom to atom but how are streams of electrons shot through the air to hit a phosphor screen in a TV or monitor by an electron gun? I have heard of electrical arc's but when those are preformed there are usually sparks going every where so I know it...