Please please help me, don't guess please my test is timed !! A tennis player hit a .057-kg ball with a force of 40 N. The duration of the force was .05 s.

1. Calculate the impulse delivered to the ball. (1pt)

2. What was the change in momentum of the ball? (1pt)

3. What was the velocity of the ball as it left the tennis racket? (1pt)

4. What would happen to the ball's velocity if it remained on the tennis racket longer than .05 s? (2pts)

need to see circuit to get time constant

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

f is prop to m1xm2 double m1 double force

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.