6. 7. U hunt..." .-..., ___ Biologists have defined a \"standard man" wn ' f 14C and of \"X will be present in an an activity due to 1\"C of 3.8 disintegrations per m 86 kg man? w- . in gm" of carbon. What {A piece of an ancient Wooden boat shows 15 the age of the boat? (\"300 years It is found that 46.3 mg. of naturally occurring potaSsium shows a B-activity of 1.5 disintegrationisec. The isotopr ' 2% of the natural mixtur . Calculate the half life of \"K. responsible {or this activity is '0 (1.23 x 109 y f l millicurie with 333R" and 238i}. Wh: (6.5 X [04.2 kg" 3 ks be irradiated in a nuclear reactor to reach 90% of its saturation activity How long would a sample 0 the rate of formation of the radio-isotope \"P in the reactor is S x 10'0 atomslsec.? Given the half life of 32 P as 14 (48 day days. Calculate the number of gms of material required to produce an activity 0 ' e difference