Here's some homework True/False questions I got for homework, need some help making sure my answers are right. True/False: 1)In a collision between a laight hydrogen molecule and a heavy water molecule, the momentum lost by one molecule is exactly the same as the momentum gained by the other molecule. 2)Mechanical energy is conserved whenever momentum is conserved. 3)Kinetic energy is conserved only in perfectly elastic collisions, but momentum is conserved in all collisions. 4)Two cars collide, lock bumpers and eventually slide to a stop due to friction with the roadway. During this entire process, mechanical energy and momentum are both conserved. 5)If the dot product of two nonzero vectors is zero, those vectors must be perpendicular to each other. 6)When a moving object hits a stationary object and causes it to move, some of the moving object's kinetic energy is transformed into momentum in the object that was at rest.