In a laboratory experiment, john uses mesh to seperate soil particles from water. which technique of seperation is he using?

After cloud droplets form, what must happen to them for precipitation to occur?

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

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?