How did you know that vinegar diffused into the cubes? (remember, as vinegar diffuses into the agar, the agar becomes more acidic. this diffusion causes the phenolphthalein indicator to change from pink to colorless.) did the diffusion distance differ between the cubes?

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.