A car of mass 1000 kg moving at 20 m/s collides with a 5000 kg truck at the initial velocity of 10 m/s. After the collision, the car continues in the same direction with a
velocity of 10 m/s. Neglecting friction, the velocity of the truck after the collision
is__m/s. (Round to the nearest tenth).

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

14. a body is projected with velocity vi from a. at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?