Which ion is most easily reduced? (l ) zn2+ (2) mg2+ (3) co2+ (4) ca2+

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

What are the advantages of using the metric system? designed as a decimal system making conversions simpler more accurate system of measurement has prefixes that correspond to an amount to use with all base units used by the entire scientific community

Wind and moving water provide energy. chemical mechanical thermal none of the above