What is the boiling point of the automobile radiator fluid prepared by mixing 1.04 L of ethylene glycol (HOCH2CH2OH, density = 1.114 g/mL) with 1.10 Lof water (density = 1.000 g/mL)?

the answer is na (sodium)

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.