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ra1l [238]
3 years ago
14

Four research teams measured the rotation period of a newly detected neutron star, and what each team wrote in its team notebook

is shown in the table below. Suppose a later and more reliable measurement gives 0.710s for the period of the same star Decide which of the earlier measurements was the most accurate, and which was the most precise.
Team what was written in the notebook most accurate measurement most precise measurement
A 0.70sec
B 0.71s
C 0.75 ± 0.002s
D B/w 1.05s and 1.115s
Chemistry
1 answer:
makvit [3.9K]3 years ago
7 0

Answer:

Explanation:

The correct measurement is .710 s which is equal to .71 s so second measurement that is 0.71 s is most accurate measurement .

B.  0.71s is the most accurate .

Precision depends upon measuring instrument . Measurement by highly precise instrument has greater precision .

The measurement of 0.75 ± 0.002s must have been taken from high precise instrument because it is capable of making measurement upto 3 decimal points .

Hence

C 0.75 ± 0.002s is most precise measurement .

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A chemist mixes sodium with water and witnesses a violent reaction between the metal and water. this is best classified as
Tema [17]

A law is statement about an observed concept. A theory involves the explanation of scientific concepts or principles. A hypothesis is the predicted explanation about some concepts that has to be tested in order to prove it to be right. An observation is the observing the results of a scientific experiment carried out to test an hypothesis.

Here the given statement 'A chemist mixes sodium with water and witnesses a violent reaction between the metal and water,' can be classified as an observation as it explains what the chemists observes as a result of his chemical experiment or test..

8 0
3 years ago
If 2.27 moles of bromine react with excess phosphorus, how many moles of phosphorus tribromide will be produced
zalisa [80]

Answer:

The answer to your question is 1.51 moles of PBr₃

Explanation:

Data

moles of Br = 2.27

moles of PBr₃ = x

Balanced chemical reaction

                   2P   +   3Br₂  ⇒   2PBr₃

             Reactant      Element     Products

                   2                  P                 2

                   6                  Br                6

-Use proportions to find the answer

              3 moles of Br₂ ------------------  2 moles of PBr₃

         2.27 moles of Br₂ ------------------  x

               x = (2.27 x 2) / 3

               x = 4.54 / 3

              x = 1.51 moles

7 0
3 years ago
Read 2 more answers
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damaskus [11]

Answer:

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Explanation:

hope this helps you :)

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Diano4ka-milaya [45]
The best and most correct answer among the choices provided by the question is the first choice "distinguishable components"<span>
A heterogeneous mixture<span> is made of different substances that remain physically separate. </span>Heterogeneous mixtures<span> always have more than one phase (regions with uniform composition and properties). A </span>mixture<span> of sand and sugar is a </span>heterogeneous mixture<span>.
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I hope my answer has come to your help. God bless and have a nice day ahead!</span>
5 0
3 years ago
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Mamont248 [21]

Answer:

exothermic reaction

Explanation:

your welcome :)

4 0
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