Homework Help: Physics- Elena please help!

Posted by Mary on Wednesday, December 5, 2012 at 6:26pm.

An interstate highway has been built though a poor neighborhood in a city. In the afternoon, the sound level in a rented room is 114.0 dB as 172 cars pass outside the window every minute. (a) What is the sound intensity during the day ?
(Reminder: If you choose to use scientific notation to enter your answer, use the form 5E-4 to indicate 5 x 10-4) (b) What is the sound intensity at night? (c) What is the average late-night sound level?

Physics- Elena please help! - Killianna, Wednesday, December 5, 2012 at 6:28pm
Figure it out. look it up on google. Smarts
Physics- Elena please help! - Mary, Wednesday, December 5, 2012 at 6:33pm
I don't understand how to do it, you dont need to be mean about it. I am asking for someone else's help.
Physics- Elena please help! - Killianna, Wednesday, December 5, 2012 at 6:38pm
Sorrry i was responding to facebook
Physics- Elena please help! - Killianna, Wednesday, December 5, 2012 at 6:39pm
But im sorry. I have no idea how to figure that out. What grade are you in where u have to answer that question??
Physics- Elena please help! - Mary, Wednesday, December 5, 2012 at 6:54pm
Junior in College
Physics- Elena please help! - Not Elena, Wednesday, December 5, 2012 at 11:25pm
A) Find intensity by using B= 10 X log (I/10^-12) formula
B) Take the answer for A multiply it by the number that it gives you for the new amount of cars that pass. Divide that number by your 172.

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