What is the longest mountain chain on earth?

How have the greenhouse gasses increased from the year 2000 to 2018

What is the mass of 0.46 mol of mgcl2

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