You have two identical 30kg spheres. Both spheres have the same size, same shape , and the same amount of charge. One of the spheres is sitting on the ground ( without being electrically grounded), the other is floating at a height of 2m . If the electric force is what keeps the second sphere floating, what is the charge on each sphere ?

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery