An echo is heard from a building 0.485 s after you shout "hello." how many feet away is the building if the air temperature is 30.6°c?

84.63 m

Explanation:

The speed of sound in the air, at is , and for each degree Celsius the temperature rises, the speed of the sound increases by . So, if we estimate the speed of sound at it will be .

On the other hand, the speed of sound is defined as the distance traveled in a especific time :  

Where:  

is the speed of sound  

is half the time the sound wave travels since you say "hello", the sound wave hits the building and then returns to you

is the distance between you and the building

Finding :  

Finally:  

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i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!

answer///scientific method;