Answered

1.)can there be a negative decibel, such as -10dB? if so, what would this mean?
2.)would you expect a spacecraft to the moon to produces shock wave during its entire trip?

Sagot :

Dhenieloptionaviz
negative decibel is sounds that are lower that our hearing 
infrasonic
2  no beacuse there is no more air in most of the trip
TaengParkviz
1. yes, negative decibel is decibel sound waves can travel 300 miles through the ocean. or intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale.
2  nope, because there hasn't showck wave during entire trip.

>Hope it helps
don't copy my answer,it is based on my mind !!
From: TaengPark