How do warm air molecules move? A. They move quickly and rise over warm surfaces
B. They move slowly and rise over cold surfaces
C. They move quickly and sink over warm surfaces
D. They move slowly and sink over cold surfaces.

One of the cell membrane's functions is to protect the cell keep wastes in the cell create new cells keep light out of the cell

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size