1. The note A6 is 4 octaves above the note A2. What is the ratio of the frequency of A6 to the frequency of A2?
2. How many times "stronger" is an earthquake of magnitude 7 (on the Richter scale) than an earthquake
of magnitude 4?
3. How many times "stronger" is an earthquake of magnitude 8 (on the Richter scale) than an earthquake
of magnitude 4?
Eh Class

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

Explain why electric current cannot exist if a current doesn't have a voltage source.

Amother used 150 watts of power to raise a 15 newton object in a time interval of 8.0 seconds. through what vertical distance was the object raised ?