Question

1. after sending out a signal, sonar technology listens for a certain period of time and registers the __, or reflections of the pulse.

o transverse wave
o echoes
o decibels
o amplitude

1. the time it takes for sonar signals to reflect back is translated into distance using a calculation based on how fast sound travels in water of that __

o salinity
o temperature
o pressure
o density

Explanation:

1. Sonar technology listens for echoes which are the reflections of the pulse. Transverse waves are a type of wave propagation not related to sonar reflections in this context. Decibels measure sound - level and amplitude is a property of a wave.
2. The speed of sound in water depends on temperature. Salinity, pressure and density also affect the speed of sound in water, but temperature has a more significant and direct impact on the speed of sound in the context of sonar - based distance calculations.

Answer:

1. B. echoes
2. B. temperature