Search: Physics - Half life

1. What is the half-life of Strontium-90? Explain your answer. Honestly I don't know how to get t... 14C has a half-life of 5,730 years. If we start with 70 grams of 14C at time zero how many grams of... The half-life of Th-232 is 1.4E10. Find the number of disintegrations per hour emitted by 1 mol of T... I have: the half life of U-238 is 4.5 x 10^9 yr. A sample of rock of mass 1.6g produces 29 disinteg... What are the half-life (t1/2) and decay constant (upside down y) of a radioactive material? Answers... The half-life for the second-order reaction of a substance A is 55.8 s when concentration of initial... The half-life of the following first order reaction is 231 seconds. What percent of the original con... The half life of Am-241 is 432 y. If 2.00 g of Am-241 is present in a sample, what mass of Am-241 is... ok so i got... the half life of carbon-14 is 5730 years, the relation c+(1/2)^ N/5730 is used to ca... 6. The half-life of a certain radioactive material is 32 days. An initial amount of the material ha...