If 7.84 × 107 j of energy is released from a fusion reaction, what amount of mass in kilograms would be lost? recall that c = 3 × 108 m/s.

7.06 × 1024

8.71 × 10-4

8.71 × 10-7

8.71 × 10–10

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?