Three students made multiple weighings of a copper cylinder, each using a different balance. Describe the accuracy and precision of each student’s measurements if the correct mass of the cylinder is 47.32 g.

Answers

Answer 1

Answer: Accuracy is the closeness of a measurement to its true value. Precision is the closeness of more than one measurements to each other. The measurements of Lamant is both accurate and precise while the scale of Colin is the opposite. Kirvin is precise but he is not accurate.

Answer 2

Answer:

Final answer:

Accuracy relates to how close a measurement is to the true value, whereas precision refers to how similar multiple measurements are to each other. Assuming Student A's measurements were close to 47.32g and each other, they were both accurate and precise. Student B's would be imprecise but precise if they were not close to 47.32g but close to each other, while Student C's measurements would be neither if they were scattered and not close to 47.32g.

Explanation:

In Physics, when we discuss measurements, two important concepts come up: accuracy and precision. Accuracy refers to how close a measurement is to the actual, true value, in this case, 47.32g. Precision, on the other hand, signifies how close several measurements are to each other, irrespective of how accurate they are.

For each student's weighings:

Student A's measurements were all very close to 47.32g, porvided they were also close to each other, then their measurements were both accurate and precise.
Student B's measurements were not close to 47.32g, but were very close to each other, then their measurements were imprecise but precise.
Student C's measurements were all over the place and not at all close to 47.32g, then their measurements were neither accurate nor precise.

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Which of these is a mixture?a. oxygen
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c. carbon dioxide
d. carbon

Answers

Answer is: b. air.

Homogeneous mixture (air) has the same proporties of its components (nitrogen, oxygen, carbon dioxide) throughout any given sample.

Together, nitrogen (N₂) and oxygen (O₂) by volume account for 99,03% of the gases composing the dry air in the lower atmosphere.

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During an experiment a student measured the temperature of water while it boiled in a pot on a stove. The temperature of the water stayed at 100°C during the entire time that the water was boiling.

Answers

Answer:

The temperature of the water stayed at $100^(0) C$ because the temperature of a pure water does not increase at its boiling point, $100^(0) C$ . This is due to latent heat of vaporisation.

Explanation:

During a change of state of a substance, the temperature does not change due to latent heat of the substance. Latent heat is the amount of heat required to convert a unit mass of a substance from one state to another without a change in its temperature. There are two types of latent heat, latent heat of fusion anf latent heat of vaporisation.

So during the experiment, the water got to its boiling point and continues to boil at this constant temperature until it would change completely to steam at that temperature. After the conversion process, the temperature begins to increase.

The latent heat of vaporisation came into action during the process of boiling the water at constant temperature. That's why the temperature of the water did not increase even after reaching its boiling point ( $100^(0) C$ ).

Answer:

c,interpretation of the data

Explanation:

A good scientific explanation needs to be based on both data collected in an investigation and on the ability to interpret what the data means.

Normally, adding heat energy increases the temperature of a substance. However, during a phase change, the temperature of the substance stays constant. This happens because the heat energy is being used to change the phase of the matter instead of the temperature.

Please helpRadiocontrast dyes are considered safe because the isotopes have short half-lives and the isotopes coat the gastrointestinal tract and are not absorbed by normal tissue. If a patient ingests 10.0 mg of iodine, how long until the iodine-134 is 99% out of the patient's system if the half-life of iodine-134 is 52.6 minutes?

Answers

In 52.6 mins the 10 mg of iodine will be divided by its half-life which is 2 it will become 5 mg (in 52.6 minutes ) and same procedure will be followed until it reach 99% out of the patient's system.

The answer is 368 minutes will it takes the iodine to be absorbed in one's system.

Why is density a characteristic property of matter?

Answers

The density is specific, because each type of matter has a value for the density, being then used to identify the type of matter, like any other type and property specifies. For example water has density 1 g/mL, and no other kind of matter has this value for density.

hope this helps!

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Answers

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Answers

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