The equation of a transverse wave traveling along a string is given by V = (4.5 mm) Cos[(12 mm)x + (30 s']
Calculate the
1) frequency
i) phase velocity for this wave​

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

Most of the volume of an atom is occupied by the