Twenty fluorescence spectra were signal averaged to yield a resulting spectrum with a signal/noise ratio of 30: 1. how many spectra would you need to acquire and signal average in order to attain a signal to noise ratio of 100: 1? put minimum number needed

l dont know l am s sorry

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.