Into which units is the geologic time scale subdivided? a: relative ages b: absolute ages c: months and days d: era and periods

Anybody wanna ? (picture included? )

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?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these