Bacteria have a well-earned reputation for causing disease, but now certain types of microorganisms are being put to good use by improving water cleanliness and safety. Waste water produced by factories is contaminated with heavy metals—elements that are naturally present in our bodies in small amounts, but which can be extremely dangerous to humans at higher levels of concentration. To clean this industrial waste water, it is put through the process of bioremediation, or the use of microorganisms to treat water that has been contaminated by hazardous materials. Water that has been cleaned by this method can then be released into the environment or even reused. One method of bioremediation is called biogenic hydrogen sulfide precipitation technology
clay or shale not able to be moved through
Answer:
The mass of the box, m = 30.61 Kg
The acceleration of the box, a = 0.65 m/s²
Explanation:
Given that,
The weight of the box, w = 300 N
The sliding force acting on the box, F = 20
Since the weight of a body is equal to the product of mass and displacement. The mass of the box is given by the relation
m = w/g
Substituting the given values in the above equation
m = 300 / 9.8
= 30.81 Kg
Hence, the weight of the box is, w = 30.81 Kg
Since the sliding force acting on the box is 20 N
Therefore, acceleration
a = F / m
= 20 / 0.81
= 0.65 m/s²
Hence, the acceleration acting on the box, a = 0.65 m/s²