Answer:
The BOD5 for this sample is 5 mg/L
Explanation:
The BOD5 takes into consideration the difference between the initial DO and the final DO divided by the fraction of the sample tested in a 300 mL BOD flask. The problem states that the sample was directly placed in a BOD bottle so we assume that the volume used was 300 mL of the water sample. The fraction of water is 1 (300/300).
BOD5 = (10-5)/1
BOD 5 = 5 mg/L
Answer:
That is true
Explanation:
This statement is true as far as total fertility rate is concerned. Hope this helps
That the speed of its expansion is increasing
Answer:
d. heavy rain or snow
Explanation:
Cumulus clouds -
These are the type of cloud , with flat bases , and they appear to be fluffy , cotton like , puffy , are referred to as the cumulus cloud.
They are usually presents in line or in clusters.
They are present at lower level from the surface of earth , around 2, 000 m .
These cloud usually bring lightning , heavy rain , snow , hail with them .
Hence , from the given statement of the question,
The correct term option is d. heavy rain or snow .
