For heat transfer purposes a standing man can be modeled as a 32 cm diameter, 159 cm long vertical cylinder with both top and bottom surfaces insulated and with the side surface at an average temperature of 34 degrees c. for a convection heat transfer coefficient of 20 w/m^2, determine the rate of heat loss from this man by convection in an environment at 25 degrees c.

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.