Footprints are found at the crime scene. Investigators take note of the scalar quantity of the footprints. Analyzing the scalar quantity of the footprints can give them clues about everything except direction
length
speed
energy

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

what bodys are there orbiting?