Which of these statements are the same for both nuclear reactions and chemical reactions? Check all
that apply.
Both can be represented by balanced equations.
Both involve changes to electron arrangements in atoms.
Both involve a change in energy.
Both result in a change in the identities of elements.
DONE
Intro

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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.