Does the number of people in a cart affect the average speed of the roller coaster

One or more substances changing into one or more substances is an example of a

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?