Ameteorite is determined to be 4.5 billion years old. it now has 78 atoms of lead-206. assuming no loss of daughter isotopes, how many atoms of uranium-238 did the meteorite have to begin with? the half-life of uranium-238 is 4.5 billion years. a) 156 b) 312 c) 78 d) 238

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a