Now our wavelength is getting longer because the waves are stretching out.
This make the lower as well
as the pitch we hear.

1. Frequency
2. Loudness
3. Amplitude

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? ?

Ineed the answer to question 1 , i’m desperate

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow