Answer:
Fast facts on fitness:
1.Maintaining physical fitness can help prevent some diseases.
2.With exercise, body composition can change without changing weight.
3.Athletes’ hearts show different changes dependent on their chosen sport.
4.Muscle strength increases by fiber hypertrophy and neural changes.
5.Stretching to increase flexibility can ease a number of medical complaints.
Answer:
crust lower mantle and upper mantle
Explanation:
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=\frac{DOi-DOf}{fraction}](https://tex.z-dn.net/?f=BOD5%3D%5Cfrac%7BDOi-DOf%7D%7Bfraction%7D)
BOD5 = (10-5)/1
BOD 5 = 5 mg/L
Corn is a primary subsistence crop is in danger due to soil erosion