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The only way a biochemical oxygen demand value could be negative is if oxygen increased in your incubation. This could result from several errors, but most likely light was allowed to penetrate your bottle allowing photosynthesis to occur. If everything was done correctly (e.g. insturments are calibrated and working, no errors were made in calculations) you should have at least a 1mg/L difference between initial and final dissolved oxygen readings yielding a positive value.
What else can I help you with?
Does a demand curve always have a positive slope?
Demand curves almost always have negative slopes. The Y value being price and the X value being quantity. The higher the price, the more negative the slope. There are very rare conditions where a demand curve could have a positive slope, but its not normally used in business classes.
What does a negative add a positive equal?
If the absolute value of the negative is bigger than that of the positive, then the answer is negative. If the absolute value of the negative is the same, then zero. If the absolute value of the negative is smaller, then positive. Absolute value is the value ignoring the sign.
Will a negative number to the fifth power be a positive or negative value?
The result will be a negative value.
Can an absolute value equal a negative?
An absolute value can not be negative.
Does a negative value multiplied by a negative value eguals a negative?
No, like signs multiply to positive, unlike to negative.
Can dissolved oxygen value be a negative value?
No, dissolved oxygen values cannot be negative. Dissolved oxygen levels in water are typically measured in milligrams per liter (mg/L) or parts per million (ppm) and will always be a positive value. Negative values would not make physical sense in this context.
What will happen to the chemical oxygen demand value if HgSO4 is not added?
the effect of Cl- is appear and the value of COD becomes more than the really value
Does a demand curve always have a positive slope?
Demand curves almost always have negative slopes. The Y value being price and the X value being quantity. The higher the price, the more negative the slope. There are very rare conditions where a demand curve could have a positive slope, but its not normally used in business classes.
Can the USO ETF go negative in value?
Yes, the USO ETF can go negative in value due to factors such as market conditions, supply and demand dynamics, and changes in the underlying assets it tracks.
What is the value of negative 9?
negative nine is the value of negative nine
What does a negative add a positive equal?
If the absolute value of the negative is bigger than that of the positive, then the answer is negative. If the absolute value of the negative is the same, then zero. If the absolute value of the negative is smaller, then positive. Absolute value is the value ignoring the sign.
Does a positive value multiplied by a negative value equal a positive?
No, the product of the multiplication of a positive and a negative value is negative.
Will a negative number to the fifth power be a positive or negative value?
The result will be a negative value.
Can an absolute value equal a negative?
An absolute value can not be negative.
A positive number minus a negative number is?
If negative value>positive value then result is -ve If positve value>negative value then result is +ve
Does a negative value multiplied by a negative value eguals a negative?
No, like signs multiply to positive, unlike to negative.
What is the chemical oxygen demand of drinking water?
The chemical oxygen demand (COD) of drinking water is typically low, ranging from 1 to 5 mg/L. This value indicates the amount of oxygen required to oxidize organic and inorganic matter present in the water. High COD levels in drinking water can indicate contamination and the presence of pollutants.
