Two balls are placed near one another and hang down, as shown below. which conclusion is supported by this evidence? neither ball has a charge. the balls are both positively charged. one ball is positively charged, and the other is negatively charged each ball has a charge, but the type of charge is unknown mark this datum save and exit submit

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.