HELP PLEASE Which of these is measured in meter per second per second?

•speed
•velocity
•acceleration
•displacement

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

An unsaturated hydrocarbon is a hydrogen-carbon compound with a. a network solid structure b. single bonds c. single bonds in a branched-chain structure d. double or triple bonds