An inexpensive home theft deterrent is leaving a front outside light on all night. If you were to leave a 15 watt LED light on outside every night for 12 hours, and for 30 days, what would it cost if the current rate for electrical energy is $0.010/kw-hr?

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward