When you grind wheat to make flour, the flour comes out very warm--you can actually scorch the flour if you grind too quickly. Why does the temperature rise? Why does the temperature rise? A. The heat is transferred to the wheat while grinding.
B. The heat is released from the wheat in the process of grinding.
C. The work done by the wheat while grinding is converted to a rise in its thermal energy.
D. The work done on the wheat while grinding is converted to a rise in its thermal energy.

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.