What percent of the u. s. workforce was estimated as of 2011 to work in agriculture-related positions? 20 percent 5 percent 60 percent 45 percent

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid