ind , a bird flew at a ground speed of 3mi/h. Flying the same path against the same wind, the bird travels at a ground speed of 1.5mi/h. What is the bird's air speed

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

Explain why electric current cannot exist if a current doesn't have a voltage source.