Aconcert loudspeaker suspended high off the ground emits 25.0 w of sound power. a small microphone with a 0.500 cm^2 area is 55.0 m from the speaker. a. what is the sound intensity at the position of the microphone? express your answer with the appropriate units.
b. how much sound energy impinges on the microphone each second? express your answer with the appropriate units.

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels.the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause,directly and indirectly, for such a rise in sea level is