Answer:

Explanation:
As we know that the level of intensity is given as

here we know



now the sound is travelling in all possible directions so we have



now for level of sound we have


800 J Got it right on edgenuity
Purpose of life is to explore and get experience. Another reason is to love and let what makes you happy guide you
I think it would be sodium.
Because the atomic mass is protons + neutrons, so I did 6 + 5 = 11
Then I looked on the periodic table for an element with the atomic mass of 11 and it was Na... Sodium.