The convection heat transfer coefficient between a surface at 40°C and ambient air at 20°C is 20 W/m2oK. How do we calculate the heat flux leaving the surface by convection?
The inner and outer surface temperatures of a glass window 5 mm thick are 15 and 5°C, respectively. What is the heat loss through a window that is 1 m by 3 m on a side? The thermal conductivity of glass is 1.4 W/mK.
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A small radiant heater has metal strips 6 mm with a total length of 3 m. The surface emissivity of the strips is 0.85. To what temperature must the strips be heated if they are to dissipate 2000 W of heat to a room at 25 oC? Thank you. <3 <3 <3
A Styrofoam cylinder, filled with water, sits on a table. You then poke a small hole through the side of the cylinder, 20 cm below the top of the water surface. What is the speed of the fluid emerging from the hole? Thank you.
