What is the pressure resulting from a gas filling a cubic box with 19.8 m length each side, and filled with 55 moles of gas atoms

Assume that our gas constant is R = 8.315 J/Kmol, and our gas is at room temperature, which is T = 300 K

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

e/c, where e is its total energy

it's a b and