When determining if a change to matter is physical or chemical, you would observe key indicators to use as clues. What is the most correct explanation that a physical change has occurred?

a. fireworks exploding, because energy is released as light and heat
b. gasoline burning, because it forms water vapor and carbon dioxide
c. crushing an ice cube, because the chemical structure of the ice cube is changed
d. dicing potatoes, because the molecules are separated but remain the same substa

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?