This preview shows page 1. Sign up to view the full content.
Unformatted text preview: . is converted to energy, according to Einstein's equation: E = b.me? = (2x3.344  6.645) x1027 kgx(3x 108 mjs)2 = 3.87x1012 J. n hue it crosses the sticky patch, the bug loses AcE = Wnc = P,kmg (1.5 cm). The initial ibfthe bug is Eo = mg(ll em) (measured above' ,ttom). Since Eo/ ILlEI = (11 cm)/(0.61) x Ii )= 12.02, the bug wUljust barely complete crossings. . Problem
63. A hypothetical power plant converts matter entirely into electrical energy. Each year, a worker at the plant buys a box of Ig raisins, and each day drops one raisin into the plant's energy conversion unit. Estimate the average power output of the plant, and compare with a 500MW coalburning plant that consumes a lODcar trainload of coal every 3 days. Solution The energy equivalent of 1 g of mass is me?, so the power generated in one day is (103 kg) x (3x 108 m/s)2/(86,400 s) = 1.04 GW, or approximately twice the output of a 50DMW coalburning plant. Thus, the massenergy of one raisin is equivalent to the chemical energy (times the .overall e...
View
Full
Document
This note was uploaded on 07/27/2009 for the course PHYSICS 101 taught by Professor Wormer during the Spring '08 term at NYU Poly.
 Spring '08
 WORMER
 Physics, Conservation Of Energy, Energy, Work

Click to edit the document details