<span>The four stages of listening include hearing, understanding, "Evaluating" and responding.
Hope this helps!</span>
The equation to find force is f=ma. So, if you plug in the information that you have you'll get F=5x3 and that'll equal F=15N

A system that can be affected by the outside environment, by an exchange of matter or energy is an open physical system .
Answer:
b, a, c
Explanation:
The middle one has the shortest wavelength, then it's the top one and the last one has the longest wavelength.