Consider a power plant located 25 km outside a town delivering 50 mw of power to the town. the transmission lines are made of aluminum cables with a 7cm2 cross-sectional area. find the loss of power in the transmission lines if it is transmitted at (a) 200 kv (rms) and (b) 120 v (rms).

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)