I'm assuming you're asking about if you drop them both from the same height. They will hit the ground at almost the same time, although the bowling ball might encounter more air resistance and land...
Cannons came in many different sizes, and the projectiles used changed in weight based on size and application. Generally, cannons were identified by the weight of the projectile that would...
The Napoleonic Wars started in the 1800's and artillery played a major role in the armies that fought in those wars. Cannons fired cannon balls 200 years earlier.