An important dimension in aerodynamics is the mach number, which is v divided by c, the local speed of sound (i. e., m=v/c). for an aircraft flying at 950mph through air at 40°f, what is the mach number? answer tolerance = 2%. write your answer in the space provided below to two decimal places.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

The higher the astm grain size number, the finer the gran is. a)-true b)-false

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