Critical point liquid
solid
pressure (atm)
triple point gas
temperature (°C) -
What does the negative slope of the solid-liquid phase boundary in the phase diagram of water indicate?
OA. The density of solid water is less than that of gaseous water.
OB. The density of liquid water is less than that of gaseous water.
OC. The density of solid water is greater than that of liquid water.
The density of solid water is less than that of liquid water.
OD

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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.