Given vectors d (3.00 m, 315 degrees wrt x-axis) and e (4.50 m, 53.0 degrees wrt x-axis), find the resultant r= d + e. (a) write r in vector form. (b) write r showing the magnitude and direction in degrees.

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.