15. A travelling wave is described by the equation y(x, t)= 0.003 cos (20 x + 200t) where y and x are measured in meters and t in seconds. What is the period of this wave?

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

What is the measure of a change in an objects velocity?