1. A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.73 kg sample of carbon from the wood has an activity of 2330 decays per minute. Find the age of the charcoal. Living material has an activity of 15 decays/minute per gram of carbon present and the half-life of 14C
is 5730 y. Answer in units of y
2. The asymptotic wavelength (λlimit) for the Brackett series is 1500 nm. What is the wavelength of the first emission line?
Answer in units of nm
3. asymptotic wavelength (λlimit) for the Lyman series is 91.1 nm. What is the wavelength of the third emission line?