Suppose you have a box one meter cach direction. the temperature of the box is 300k. what is the luminosity? ( watt of the box is sooer long in cach direction. there are 6 sides to the box). a. 220 watts b. 275 watts c. 2750 watts d. 22,000 watts e. 39,500 watts

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.