The crane is doing work as it hold the massive bundle of trash high in the air. The bundle of trash is released and falls into the landfill. In this case, the crane is doing work and the bundle has mechanical energy in the form of

potential and the kieetic

Explanation:

bc blah

explanation:

bc blah

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds