Suppose that 0.1 kg of liquid copper is super-cooled to by 250k where it is allowed to nucleate and solidify adiabatically(no heat is lost to the surroundings).

calculate how much copper will solidify until until the temperature recalesces to its melting point of 1356k.

the specific heats of of solid and liquid copper in j/k. mol are： c_ps = 22.64 + 5.86×10-3t = 31.4, c_pl=31.4 where t is in degrees kelvin.

the heat of fusion of copper is 13.2 kj/mol and its molecular weight is 0.0635 kg/mol

how much supercooling would be necessary in order to solidify the entire sample adiabatically?

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.