5- B- Forced vibrations, such as those that occur between a fretboard and a large cabinet surface, produce a much lower sound than that produced by the original vibrating body.
8- B. The area covered by the wavefront increases as the wave progresses, but the energy that passes through a wavefront in a unit of time decreases.
18- c- The frequency of the sound waves will change for the listener as a result of the Doppler effect.
The Doppler effect is a change in frequency due to a change in the source.
The nurse should ask during the interview portion of the
developmental assessment with the parent of an infant between 10 and 12 are; First
Does your baby stand independently? Second "Is your baby able to walk with
assistance?” and "Does your baby sit from a standing position?"
