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Art [367]
3 years ago
9

The three main types of scientific investigations are descriptive, comparative, and experimental. Which components are

Chemistry
2 answers:
kirza4 [7]3 years ago
7 0
The components included in all three are a scientific question, a procedure, and a conclusion. A scientific question is used to identify the purpose of an experiment, which an investigation can be designed from. A procedure must be present in every experiment so that there is structure to every investigation. Conclusions are always present, because they summarize the results and outcomes of the experiment.
Marina86 [1]3 years ago
5 0

Answer:the abswe is a,d, and f

Explanation: the peson below couldve just said that thx have a good day:)

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3 years ago
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How many grams of F− must be added to a cylindrical water reservoir having a diameter of 2.02 × 102 m and a depth of 87.32 m?
aksik [14]

Complete Question:

To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.800 ppm fluoride. How many grams of F− must be added to a cylindrical water reservoir having a diameter of 2.02 × 102 m and a depth of 87.32 m?

Answer:

2.23x10⁶ g

Explanation:

The concentration of the fluoride (F⁻) must be 0.800 ppm, which is 0.800 parts per million, so the water must have 0.800 g of F⁻/ 1000000 g of the solution. The density of the water at room temperature is 997 kg/m³ = 997x10³ g/m³. So, the concentration of the fluoride will be:

0.800 g of F⁻/ 1000000 g of the solution * 997x10³ g/m³

0.7976 g/m³

The volume of the reservoir is the volume of the cylinder: area of the base * depth. The base is a circumference, which has an area:

A = πR², where R is the radius = 1.01x10² m (half of the diameter)

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m = 0.7976 * 2.7983x10⁶

m = 2.23x10⁶ g

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3 years ago
Using the law of conservation of energy what is the kinetic energy at D
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Answer:

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2 years ago
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