The problem involves determining the mean lifetime of a proton based on the decay rate observed in a cubic kilometer of seawater. Participants are exploring the relationship between decay rates and mean lifetime in the context of particle physics.
Some participants have provided calculations and insights regarding the decay rate and the number of protons, leading to a clearer understanding of how to approach the mean lifetime calculation. However, there is still some uncertainty regarding the correct equations to use.
Participants note that the problem specifically asks for the average lifetime rather than the half-life, which influences their approach to the calculations.
mgb_phys said:How many protons are there in a km^3 of sea water
How many decay per year?
So what's the decay rate?
mgb_phys said:It doesn't ask for a halflife it asks for an average lifetime.
If 3 in 6 x 10^29 decay per year - then the average time for a proton to decay is just 1/decay rate (from dimensions)