Active is where it is a form of transport always moving, passive transport is just holding
One of the primary benefits of a survey is that they:
- <u>B. allow efficient gathering of unobservable phenomena</u>
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A survey is a system of qualitative research which is used to gather opinions of people about a particular subject or issue.
As a result of this, one of the primary benefits of a survey is to gather information about unobserved phenomena with the use of questionnaires and other means.
Therefore, the correct answer is option B
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The weight percent is of caffiene is 7.98%.
There are several ways of expressing concentration in chemistry. One of the methods of expressing concentration is by the use of percentage.
In this case, we want to obtain the percent weight/weight concentration of caffeine in benzene.
From the question, we can see that;
Mass of solute = 6.5 g
Mass of solvent = 75 g
percent w/w = mass of solute/ mass of solute + mass of solvent × 100/1
percent weight of caffeine=
6.5/6.5 + 75 × 100/1 =7.98%
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Answer:
B. databases of periodicals
Explanation:
Databases include the citations of articles in magazines, journals and newspapers. A periodical is a magazine or newspaper published at regular intervals. So if she's looking for news articles about this earthquake then she should most likely search databases or periodicals.