What causes the jet stream? (4 points) select one: a. differences in altitude between two air masses b. differences in temperature between two air masses c. differences in size between two air masses d. differences in shape between two air masses

What are the genotypic and phenotypic ratios

Which position represents spring in the southern hemisphere? a) b) c) d)

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?