One end of a solid cylindrical copper rod 0.2500 m long and 0.0350 m in radius is inserted inta a large block af solid hydrogen af its melting temperalure, 13.84 K. The other end is blackened and exposed to thermal radiation from surrounding walls at 450.0 K. (Some telescopes in space employ a similar setup. A solid retrigerant keeps the telescope very cold-required for proper operation- even though it is exposed to direct sunlight.) The sides of the rod are insulated, so no energy is lost or gained except at the ends of the rod. See the sketch in (Figure 1) (a) When equilibrum is reached, what is the temperature of the blackened end? The thermal conductivity of copper at lemperatures near 20 K is 167o W/m. K. (b) At what rale (in kg/h) does the solid hydrogen melt? EXECUTE Figure 1 of 1 > Part G Solve for the temperature of the blackened end of the rod. Express your answer in kelvins. Solid hydrogen, myyd > View Available Hint(s) 2R Copper cylinder THaa = 14.19 K T13.84 K Sub

The force from the cable AB attached to the screw eye at A is F = {300 - Î – 350 - j – 350 - N. If the length of the cable is L = 7 m, then what are the values for x, y, and z? A F В y BY NO SA 2021 Cathy Zupke The value of a = The value of y = m The value of z = N

P = 93.3 N Determine the force at F. Take it apart to help you solve