Iodine-131 has a half-life of 8 days. How many of the initial 6.022x10^23 atoms would remain after 1 year?

answer; protein;

i think its 100

i hope this !

35. a insulated cylinder of solid gold (k 310 kw/m-k) of radius v2 m and height 5 m is heated at one end until the temperature at each point in the cylinder is given by w(r, y, z) (30 z2)(2-(r2+ y2). determine the rate of heat flow across each horizontal disk given by z 1, z 2, and z 3, identifying which has the greatest rate of heat flow across it.

explanation: