Describe how does the temperature relate to density and the movement of atmospheric gases? a) as the air warms expanding its volume, decreasing its density, and the air molecules rise. b) uv light causes air to warm its volume declines, density increases, and the air molecules sink. c) the volume of air distends as it cools, while its density increases and the air molecules descend. d) radiation cools the air and its volume extends, density diminishes, and the air molecules accelerate.

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.