A sound source emits 30. 0 w of sound power spread equally in all directions. What is the sound intensity level 30. 0 m from the source?.

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

Tissues that carry food water and nutrients throughout the plant

The different layers of gases that extend form the surface of the earth into space