!FIRST ONE TO ANSWER GETS MARKED AS BRAINLIEST!
The intensity of sound waves produced by mosquito and cannon are 10^2 W/m^2 and 10^6 W/m^2. What is the relative intensity?

A. 180 dB
B. 200 dB
C. 60 dB
D. 20 dB
E. 40 dB

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.