An 80 pound and 25 ft metal rod is propped up on a rough floor against a frictionless wall in a state of static equilibrium. The center of mass of the rod is located 10 ft up the rod from the bottom. With what magnitude of forces does the vertical wall push against the rod

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.