Two toy cars hit each other and have a perfect bounce. The mass of the 1st car is 7kg and it is going 2 m/s before the collision and -6.33 m/s after the collision. The 2nd car (mass 5kg) starts by going -8 m/s before the bounce/crash. What is the velocity of the 2nd car after the bounce? (ignore friction/heat losses and round to the nearest 100th)

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask