A 150g ball moves at a constant velocity of 54km. h towards a batsman. The batsman strikes the ball straight back towards the bowler at 36 km. h. The ball is in contact with the bat for 0.1seconds. Calculate the impulse of the ball. ​

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.