Acar converts the chemical energy of gasoline to the mechanical energy of motion. the total energy of motion is less than the total energy stored in the gasoline. evidence that energy is still conserved, however, is found in which of the following observations?
a) the mass of the moving object, the car, is greater than that of the gasoline
b) the energy in the gasoline was extracted from crude oil, which had more energy.
c) some of the energy of the gasoline is also converted to heat and sound energy.
d) not all car engines are equally efficient at this energy transformation.

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.