DUE IN 10 HELP John was asked to create a model that showed the difference between conductors and insulators. The model he created is shown below. Evaluate his models and his description of his model to determine if John shows the difference between a conductor and an insulator. Describe what is good and what might be improved in his model.

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?