1.2 x 10^4 J That is in Significant Figures
Yes, because the longer cannon have more energy.
6 kg
The forces are equal in both directions. The momentum of the shot is also equal to the momentum of the cannon in the other direction. The backward velocity of the cannon is: (forward velocity of the shot) times (mass of the shot) divided by (mass of the cannon).
no
Generally called a 'battery', as in artillery used for combined action
Cannon A+Cannon B+Cannon C=Giga Cannon Cannon A+Cannon B+Cannon C=Giga Cannon
Yes, "Howitzer" is generally capitalized. It is a proper noun and refers to a specific type of artillery cannon.
the cannon balls are underneath the cannon
Joi Cannon goes by Cannon.
Nick Cannon has twins named Monroe Cannon and Moroccan Scott Cannon.
Both. "Arm the cannon" and "Arm yourself" are both examples of using it as a verb, because it is an action word in that context, like "run," "jump," or "swim." If you are referring to the arm attached to your shoulder, then it is a noun, because your arm is a thing, and a noun is a person, place, or thing.
Joe Cannon
you get your cannon on a island called cannon island, when you get there, speak to the guy when you arrive, say yes to what he says, and you'll get a cannon
Esma Cannon's birth name is Esma Ellen Charlotte Cannon.
Daeus Cannon is 6' 5".
A Potato Cannon is a cannon that runs on hairspray and obviously it shoots potatoes.