A pot of water is boiled on a stove. Which of the following definitions of the system enables the most straightforward thermodynamic analysis of the process A. The system is the pot and water.
B. The system is the stove, pot, and water.
C. The system is the building containing the stove.
D. The system is the entire Universe.

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.