Care sunt efectele fortelor de frecare in activitatea cotidiana si in tehnica?

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

How to tell if a molecule is polar or nonpolar with electronegativity

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?