7one lb of refrigerant 134a contained within a piston–cylinder assembly undergoes a process from a state where the temperature is 60f and the refrigerant is saturated liquid to a state where the pressure is 140 lbf/in 2 and quality is 50%. determine the change in specific entropy of the refrigerant, in btu/lbr. can this process be accomplished adiabatically?

Select light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to the max. then, select the start button at the source location to begin producing the waves. light is a form of electromagnetic wave, containing oscillating electric and magnetic fields. the wave amplitude detector mentioned above shows how the electric field oscillates in time at the location of the probe. the amplitude of the wave at the location of the probe is equal to the maximum electric field measured. how does the amplitude of the wave depend on the distance from the source?

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

Which type of reaction is shown in this energy diagram ?