Certain wood stove designs rely exclusively on heat transfer by radiation and natural convection to the surroundings. Consider a stove that forms a cubical enclosure, Ls 1 m on a side, in a large room. The exterior walls of the stove have an emissivity of 0.8 and are at an operating temperature of Ts, s 500 K. The stove pipe, which may be assumed to be isothermal at an operating temperature of Ts, p = 400K, has a diameter of Dp = 0.25m and a height of Lp = 2m, extending from stove to ceiling. The stove is in a large room whose air and walls are at T?

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.