If you have 85 grams of isotope H-19, which has a have life of 15,000 years. How many years has passed after 5 have lives? How much parent isotope remains after 2 half lives? How many daughter isotopes have been created?.

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Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.