A string is vibrating at 300 Hz. Using a strobe light and an ultra fast camera you get a picture of the string as sketched below. The walls are separated by 1 meter. If the string were vibrating in its lowest possible frequency, what would that frequency be

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )