Answer:
80 dB
Explanation:
Sound intensity is inversely proportional to the square of the distance traveled by the sound.
Thus;
r1^2 divide by r2^2 = L2divideL1
where r= distance (m)
L= sound intensity (decibal dB)
8squared divide by 4 squared = L2 divide 20 dB
L2 = 4 × 20
L2= 80 dB
This means that the sound is increased from 20 dB to 80 dB.
I would say carbon dioxide
I think that it is B - it is in the brain, a part of the nervous system, but it also releases hormones , which are all true.
Answer:
Explanation:
building blocks for polysaccharides (giant carbohydrates), e.g. cellulose in plants and glycogen in the human body. components of other molecules eg DNA, RNA, glycolipids, glycoproteins, ATP.
