Answer: 1344db
Explanation:
According to the question, a solo trumpet produces 84db, 15 solo trumpet will produce (84×15)decibel i.e 1260db.
Since the 15trumpets joins the first trumpet, that will make a total combination of 16trumpets making the sound at a time. This means that the total number of decibel produced is
1260+84 = 1344decibel
There are six alkaline earth metals. They are found in column 2 in the Periodic Table. They have the following properties: they are very reactive, are not found freely in nature. high boiling and melting points, low density, two electrons in the outer shell..The are most likely to be combined (to react) with the oxygen. Reacting with the oxygen the alkaline metals form oxides such as strontium oxide (SrO)
Answer:
D mowing grass
Explanation:
it dosen't change the compond of the grass