You are at the beach and the temperature of the sand is 100 F (38 C). The air temperature is 25 C. The width of the beach is 20 m. Assume that the wind off the beach is 3 m/s. a. Calculate the Grasholf number if the beach is very long. b. Calculate the heat transfer coefficient assuming free convection. c. Calculate the Reynolds number assuming that the wind goes along the width of the beach. d. Calculate the heat transfer coefficient of the forced convection of the wind. e. Calculate the Gr/Re2. Does this make sense in terms of which convection matters? f. A calm day has a wind speed of less than 1 mph (0.447 m/s). Calculate the Gr/Re2. Does this make sense in terms of which convection matters?

Please answer all parts. Thanks!