Which of the following statements incorrectly describes a scenario where the source of the sound waves and the person hearing the sound are remaining stationary? a. the frequency of the sound waves is not affected by the nature of the medium. b. the frequency of the sound waves is not altering as a result of the distance between the sound source and the listener. c. the frequency of the sound waves will change for the listener as a result of the doppler effect. d. the frequency of the sound waves will remain the same to the listener

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.

Is the vertical component of velocity ever zero?