A copper rod 85 cm long is used to poke a fire. The hot end of the rod is maintained at 115 °C and the cool end has a constant temperature of 22 °C. What is the temperature of the rod 25cm from the cool end? Please provide a full explanation and formula and units throughout the calculations so that I can understand. Please type answer, no hand-written please.
A long slender solid cylindrical rod made of copper is 2 cm in diameter. It is taken out of a liquid nitrogen bath at 77 K and exposed to a stream of warm air at a temperature of 50 C. Neglect internal temperature gradients find the time taken by the rod to heat up to a temperature of 10 C if the surface heat transfer coefficient is 20 W/m^2K. For copper, take k=330 W/mK and ?=95*10^-6 m^2/s.
The left end of a long glass rod, 10.0 cm in diameter, has a convex hemispherical surface 5.00 cm in radius. The refractive index of the glass is 1.60. Determine the position Sy of the image if an object is placed in air on the axis of the rod 4.00 cm from the left end of the rod. Express your answer in centimeters to three significant figures. Pa] ΑΣΦ ? cm 85 = 870 Submit Previous Answers Request Answer X...
Problems 4, 5 & 6 15) A heat-conducting rod, 0.90 m long and wrapped in insulation, is made of an aluminum section that is 0.20 m long and a copper section that is 0.20m long. Both sections have a cross- sectional area of 0.00040 m2, The aluminum end and the copper end are maintained at temperatures of 30 C and 230 C respectively. The thermal conductivities of aluminum and copper are 205 W/m K (aluminum) and 385 W/m K (copper)....