A0.272-kg volleyball approaches a player horizontally with a speed of 12.6 m/s. the player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 21.6 m/s. (a) what impulse is delivered to the ball by the player? (take the direction of final velocity to be the positive direction. indicate the direction with the sign of your answer.) kg · m/s (b) if the player's fist is in contact with the ball for 0.0600 s, find the magnitude of the average force exerted on the player's fist. n

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

The answer would be a) -80of