A 17 W energy-efficient fluorescent lamp is designed to produce the same illumination as a conventional 68 W lamp. How much does this energy-efficient lamp save during 64 h of use? Assume a cost of $0.77/kW · h for electrical energy. Answer in units of dollars.

Newtons view of arrangement of the universe

During cooling, the kinetic energy of the molecules falls. why does this happen? a. the motion of the molecules increases. b. the motion of the molecules slows down. c. the van der waals forces between molecules decrease d. the forces of attraction between the molecules are overcome.

Which atomic model is missing from this set