Determine the speed of sound in air at (a) 300 k and (b) 800 k. Also determine the mach number of an aircraft moving in air at a velocity of 330 m/s for both cases. The gas constant of air = 0. 287 kj/kg k. The specific heat ratio of air at room temperature is 1. 4.

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How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

The graph shows the populations of two species in a particular region over two decades. based on the graph, what can you conclude about the relationship between the two species? a. the two species have a parasitic relationship. b. the two species are mutualistic in nature. c. the two species exhibit commensalism. d. the two species have a prey-predator relationship. e. the two species have a familial relationship.