Two metal rods in a factory are oppositely charged and placed 8.9 cm apart. One rod has a charge of +7.5 × 10-7 C and the other has a charge of –5.1 × 10-5 C. What is the force between the rods? Is it an attractive or repulsive force?

Amarble, a bowling ball, a basketball, and a baseball are rolling across the floor at 10 m/s. which one has the greatest kinetic energy? the marble the bowling ball the basketball the baseball

Which best represents the law of conservation of mass ?

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.