A particle with mean proper lifetime of lu s moves through laboratory at 2.7 x 108 m/s. (a) What is the lifetime of the particle as measured in the laboratory frame? (b) average
distance traveled by the particle as measured by the same observer? (c) average distance
traveled by the particle if we neglected the relativistic effect?

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

this could be newton#'s law of cooling. the cooling curve is exponential

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min