In the bottom wave, how many complete wavelenghts are there from 0-25 on the x axis?

The material that keeps its new shape after it is stretched is called?

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

Which of the following are appropriate acceleration units?