Q: In the inspection of a sample of meat intended for human consumption
In the inspection of a sample of meat intended for human consumption, it was found that certain undesirable organisms were present. To make the meat safe for consumption, it is ordered that the meat...
See AnswerQ: A frozen-food company freezes its spinach by first compressing it
A frozen-food company freezes its spinach by first compressing it into large slabs and then exposing the slab of spinach to a low-temperature cooling medium. The large slab of compressed spinach...
See AnswerQ: In a curing process for plastic and other polymer- based materials
In a curing process for plastic and other polymer- based materials, a plastic sheet, which initially is 25°C, is placed on a hot metal surface that is maintained at 250°C. If the back (or opposite) si...
See AnswerQ: A stainless steel cylindrical billet (k = 14.4 W
A stainless steel cylindrical billet (k = 14.4 W/m K, ( 5 3.9 * 10-6 m2/s ) is heated to 593°C preparatory to a forming process. If the minimum temperature permissible for forming is 482&Ac...
See AnswerQ: A long copper cylinder 0.6 m in diameter and initially
A long copper cylinder 0.6 m in diameter and initially at a uniform temperature of 38°C is placed in a water bath at 93°C. Assuming that the heat transfer coefficient between the copper and the water...
See AnswerQ: A long wooden rod at 38°C with a 2.
A long wooden rod at 38°C with a 2.5-cm-OD is placed into an airstream at 600°C. The heat transfer coefficient between the rod and air is 28.4 W/m2 K. If the ignition temperature of the wood is...
See AnswerQ: A mild-steel cylindrical billet 25 cm in diameter is to
A mild-steel cylindrical billet 25 cm in diameter is to be raised to a minimum temperature of 760°C by passing it through a 6-m long strip-type furnace. If the furnace gases are at 1538°C and the over...
See AnswerQ: Quenching is a rapid cooling process by which many metallic alloys are
Quenching is a rapid cooling process by which many metallic alloys are hardened. Brass (a copper alloy: 70 Cu, 30 Zn) plates that are 4 mm thick are quenched in a water bath at a heat treating plant....
See AnswerQ: The heat transfer rate from hot air by convection at 100°
The heat transfer rate from hot air by convection at 100°C flowing over one side of a flat plate with dimensions 0.1 m * 0.5 m is determined to be 125 W when the surface of the plate is kept at 30°C....
See AnswerQ: A solid lead cylinder 0.6 m in diameter and 0
A solid lead cylinder 0.6 m in diameter and 0.6 m long, initially at a uniform temperature of 121°C, is dropped into a 21°C liquid bath in which the heat transfer coefficient / 1...
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