One cell performs 120 oscillations per minute, the other 240. What will be the ratio of their lengths ( I translated it sorry for mistakes)

Ten students stand in a circle and are told to make a transverse wave. what best describes the motion of the students? each student bumps the shoulder of his or her neighbor. at the exact time, all students take a step to the right. the students skip clockwise, going in a circular motion. one at a time, each student lifts his or her hands up and then down.

Select the three ways that the parallel-plate capacitor differs from a car battery.

A20 cm long spring is attached to a wall. the spring stretches to a length of 22 cm when you pull on it with a force of 100 n. what is the spring constant