At a certain place, earth's magnetic field has magnitude b =0.703 gauss and is inclined downward at an angle of 75.4° to the horizontal. a flat horizontal circular coil of wire with a radius of 10.0 cm has 1300 turns and a total resistance of 99.4 ω. it is connected to a meter with 202 ω resistance. the coil is flipped through a half-revolution about a diameter, so that it is again horizontal. how much charge flows in coulombs through the meter during the flip?

Asteel tube (k=50 w/mk) of inner and outer diameter di = 20mm and do=26mm, respectively, is used to transfer heat from hot gases flowing over the tube (h-hot = 200w/m2k) to cold water flowing through the tube (h-cold = 8000 w/m2k). what is the cold-side overall heat transfer coefficient uc? to enhance heat transfer 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. the fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15mm. what is the corresponding overall heat transfer coefficient uc? *solve for uc in both cases*