Acrane lifts a 100-kg log at a height of 10 meters above the ground and gains a certain amount of potential energy. how much potential energy would it possess if it is lowered 5 meters below?

a. the same potential energy
b. half as much potential energy
c. twice as much potential energy
d. four times as much potential energy

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?