How do the particlesthat make up an atom interact

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?

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?