Air is compressed in a piston-cylinder assembly from p₁ = 25 lb/in², T₁ = 500°R, V₁ = 9 ft³ to a final volume of V₂ = 1 ft³ in a process described by pv¹.30 = constant. Assume ideal gas behavior and neglect kinetic and potential energy effects. Using constant specific heats evaluated at T₁, determine the work and the heat transfer, in Btu. Step 1

Can you answer question 1 part a?

The following set up represents an isolated skeletal muscle with an attached 0.5g weight. The muscle is stimulated once with 8.5V, and the resulting distance the weight moves over time is recorded. Which of the following can you conclude based ONLY on these results? E Simulated Ruler (mm) 5g Distance (mm) 17 N 0 20 40 The muscle contracted isometrically The muscle experienced fatigue after 80 msec The muscle generated maximal tetanic tension at 40 msec The muscle contracted isotonically 100 120 140 160 180 200 Time (msec)

Suppose that the floating point component of a processor is upgraded so that each floating point instruction takes only 1/4 as much time to execute as previously. (The execution times of all other types of instructions remain unchanged.) If the upgrade decreases the execution time of a particular program to 0.7 times what it was originally, what fraction of the original execution time must have been spent on executing floating point instructions? (Give your answer as a decimal number to at most two decimal places, e,g, 0.13.)