Atennis player swings her 1000 g racket with a speed of 15.0 m/s. she hits a 60 g tennis ball that was approaching her at a speed of 18.0 m/s. the ball rebounds at 40.0 m/s. how fast is her racket moving immediately after the impact? you can ignore the interaction of the racket with her hand for the brief duration of the collision.
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if the tennis ball and racket are in contact for 7.00 , what is the average force that the racket exerts on the ball?

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

Which lists the organs in the correct order as food passes from the mouth to anus?