Will an object with a density of 0.999 sink or float

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?

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

What statement goes against the kinetic theory of gases