Name some of the mediums that sound can travel through

Which feature of a heating curve indicates a change ofn state

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest