A container of 1m^3 contains one cubic meter of liquid water at a temperature of 0 degrees Celsius. The walls of container are perfectly conductive and are coated with a material that has emissivity equal to 1
a. calculate heat current in radiation leaving the cube
b. how long will it take for one cubic meter of water to freeze completely
c. if volume of cube were cut i hal, would that change the time required for water to completely freeze?