Biotechnology has produce crops that are resistant to certain pests, crops that produce high yields, and more nitrogen-efficient crops. what is a negative impact that bioengineered plants may have on the environment? a) beneficial insects may be adversely affected. b) plants have an increased resistance to insect pests. c) there is an increased need for inorganic fertilizers. d) genetically engineered plants may have a longer shelf life

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)