6. Through which medium does a mechanical wave travel most quickly?
Answers:
•Solid
•liquid
•less dense gas
•very dense gas

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =