Write the nuclear equation for the indicated decay of each of the following nuclidesi a) ra - clo ( alpha ) b) sn - 126 (beta) c) th - 234 c bafa ) d)o-15 ( positron emission) el ar-37 (electron capture)

i think a, hope it .

explanation:

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.