Aball of mass 1.5kg is struck by a bat in the opposite direction to the motion of the ball. before the impulse the ball is travelling at 16ms^-1 and the impulse of the bat on the ball is 50 ns. find the velocity of the ball immediately after the impact.

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g