a star with the designation HD 12929 in constellation aries is approximately 60 light years from earth sun. this star could also be said to be how far from earth sun

6. what does the symbol ah stand for? o one calorie given off by a reaction the specific heat of a substance the heat capacity of a substance the heat of reaction for a chemical reaction

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?

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit