Recent content by zzzzzz

Ahaaa, got it... I read the first post too quickly and I thought that 4.9240 ft/s was the answer in the book... actually zzzzzz means that I'm most of the time asleep and I should wake up before reading. Excuse me :blushing:

Thanks again: your answers are always precious :) Anyway, I think I have to think over them a little more. What I can’t really catch is the difference between the effects of a system moving with constant velocity (a steady flow of charges, a magnet moving with constant velocity...) and those of...

And with this, you find the same result given by your book v=20 ft/s M= cannon mass m= cannonball mass V= cannon speed Conservation of momentum in the x direction requires (absolute values): mxv=MxV which leads to: V=[cos(10°)x200ft/sx10lb]/400lb=4.924 ft/s Now… what...

First of all, thank you for your posts and your welcome :smile: Now, back to electromagnetics ‘cuase I think I’m making a mess ;p I'm foreseeing a kind of dualism from what you say: while "steady" (not moving) charges generate static electric fields, steady currents generate static magnetic...

Hello, I've just entered this forum and... the world of Physics. And I already have tremendous enigmas. Let's start with this. Oersted revealed that a static magnetic field exists in the nearby of a current loop. Now "current" means "moving electric charges" and e.m. theory states that a moving...