Daltons model of an atom is best described as?

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

The form of energy that can move from place to place across the universe is (answer) on earth, the main source of this energy is (2nd answer) first blank; a) gravitational potential energy b) radiant energy c)thermal energy d) vibrational energy second blank; a)lightning b) the moon c) the sun d) the wind

0.0006510 kg has how many significant figures.