Suppose two stars are located in region a of the h-r diagram shown in the figure below. star x appears much dimmer that star y as seen from earth. which star can be inferred to be nearer to earth, and how do you know?

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm