It is strongly suggested you sketch out this vector problem before attempting to answer. A force F1=315N acts in the first quadrant at an angle of 70° above the x-
axis, while a second force F2 = 210N acts in the 3rd quadrant at an angle of
40° below the x-axis.
What is the magnitude of the Resultant of these two forces ?

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.