Estimate the coefficient of free convection on a wire, 2 mm in diameter, immersed in water at 20°C, if the wire surface is maintained at 300°C. A vertical plate 4 m high and 1 m wide is maintained at...

Estimate the coefficient of free convection on a wire, 2 mm in diameter, immersed in water at 20°C, if the wire surface is maintained at 300°C.

A vertical plate 4 m high and 1 m wide is maintained at 60°C in an ambient of still air at 10°C. Determine the value of heat transfer coefficient.