What is the relationship between atomic number and atomic mass number?

Atomic number is the number of protons that are inside that atom. This helps identify which element an atom is. Atomic mass is the number of protons and neutrons inside an atom. Atomic Mass Number = Atomic Number + Number of Neutrons.

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.