The velocity vector v1 has a magnitude of 4.0 m/s and is directed along the +x-axis. the velocity vector v2 has a magnitude of 3.0 m/s. the sum of the two is v3, so that v3 = v1+v2. which of the following are true: a. the magnitude of v3 can be 7.0 m/s. b. the magnitude of v3 can be -5.0 m/s. c. the magnitude of v3 can be 3.0 m/s. d. the magnitude of v3 can be 0.0. e. the x-component of v3 can be 4.0 m/s. f. the magnitude of v3 can be 8.0 m/s

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 of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)