Please help
in some molecules, the same atoms of different elements repeat. true or false?

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.