The rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typicallyµ,,= 0.002. suppose a 180,000 kg locomotive is rolling at 10 mis (just over 20 mph) on level rails. if the engineer disengages the engine, how much time will it take the locomotive to coast to a stop? how far will the locomotive move during this time?

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

Asystematic approach to problem solving is called a (an)

A15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°c to 175°c. what is the specific heat capacity of iron?