Iraq was reportedly developing a “supergun” with a barrel some 70 m long, which was to be able to launch huge artillery shells several hundred miles. During WWI, Germany used a “Big Bertha” cannon to hurl shells into Paris 30 miles away. This gun also had a long barrel. What is the reason for using a longer barrel in these guns? a.To reduce frictional losses. b.To allow the force of the expanding gases from the gunpowder to act for a longer time. c.To increase the force exerted on the bullet due to the expanding gases from the gunpowder. d. To reduce the force exerted on the bullet due to the expanding gases from the gunpowder. e.To provide a more favorable ratio of kinetic energy to potential energy. I do know that a greater velocity and, therefore, greater kinetic energy results from a longer barrel. Could it possibly be E.? Thanks.