Which of the following statements is untrue in regard to sound traveling in air?
a. during a single vibration of the diaphragm, molecules in the air near it will also complete one vibration.
b. the area covered by the wave front increases as the wave advances, but the energy passing through a wave front in a unit of time decreases.
c. sound waves in the air are transverse and consist of compressions and rarefactions of air molecules.
d. as the distance from the earth increases, the sound wave intensity also decreases due to the lessening density.

The right answer for the question that is being asked and shown above is that: "d. As the distance from the Earth increases, the sound wave intensity also decreases due to the lessening density." This the statement that is untrue in regard to sound traveling in air

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

I'm pretty sure the answer is c