A 0.15-kilogram baseball moving at 20 meters per

second is stopped by a catcher in 0.010 second. The

average force stopping the ball is

300N

Explanation:

Impulse= Mass * Velocity

F.T = M * V

F= MV/T

F= (0.15*20)/ 0.01

F= 300N

answer; i believe the answer is hydraulic action;

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.