an irrigation channel of trapezoidal section, having side slopes 3 horizontal to 2 vertical is to carry a flow of 10 m³/s on a longitudinal slope of 1 in 5000. the channel is to be lined for which the value of friction coefficient in manning's formula is n = 0.012. find the dimensions of the most economic section of the channel​

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature