Interactive learningware 13.1 explores the approach taken in problems such as this one. a composite rod is made from stainless steel and iron and has a length of 0.241 m. the cross section of this composite rod is shown in the drawing and consists of a square within a circle. the square cross section of the steel is 3.76 cm on a side. the temperature at one end of the rod is 88.9 °c, while it is 10.2 °c at the other end. assuming that no heat exits through the cylindrical outer surface, find the total amount of heat conducted through the rod in two minutes.

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)