Is mineral water a mixture or compound?

List four observations that indicate that a chemical reaction may be taking place

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d