3. A tennis ball is hit back and forth between two players. If it takes 2.3 s for
the ball to go from one player to the other, what are the period and
frequency of the ball's motion?

Time period of ball's motion is 4.6 s

Frequency of ball's motion is 0.22 Hz

Explanation:

In this problem, Time period is define as the time taken by the ball to come back to its original position.

Let A be the player who first hits the ball towards the player B. We know that ball takes 2.3 s to travel from player A to player B. It takes same time to come back to player A from player B. Thus,

Time period of ball's motion = 2 x 2.3 s = 4.6 s

Frequency is defined as the occurrence of any event per unit time. In this case, the frequency of the ball's motion is given by :

Frequency =

Frequency = = 0.22 Hz    

howdy howdy!

i'd say it would be galileo!

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)