A person in a factory has to lift a box on to a shelf. high shelf
box
low shelf
Which action involves the person doing the least amount of work?
A lifting the box quickly to the high shelf
B lifting the box slowly to the high shelf
Clifting the box to the low shelf first then lifting it to the high shelf
D lifting the box to the low shelf instead of to the high shelf

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material

Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm