Why does a cannon recall when it fires a cannonball?

Abar magnet cut in half will form a total ofpoles. a)fourb)eightc)two

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?

Heating water for hot cocoa while sitting next to a campfire can be examples of conduction, convenction and radiation at the same time agree disagree it depends how you know