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Misha Larkins [42]
3 years ago
10

How can scientists determine the absolute age of a rock sample?

Biology
1 answer:
Roman55 [17]3 years ago
5 0
Absolute Dating. The nuclear decay of radioactive isotopes is a process that behaves in a clock-like fashion and is thus a useful took for determining the absolute age of rocks. Radioactive decay is the process by which a "parent" isotope changes into a "Daughter" isotope. 
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Allen pours water into a graduated cylinder. He notices that the surface of the water is curved, as shown below.
Slav-nsk [51]

Answer:

When water is added to a graduated cylinder, having a surface where the sides of the water look higher than the center means that the curved surface is a concave meniscus which has formed because of surface tension (Choice C).

Explanation:

A meniscus is simply the curvature that the surface of a liquid acquires when it is in a container, such as a graduated cylinder. It is concave when there is attraction between molecules -water and glass- or it can be convex when both surfaces are repelled.

<u>Water is a polar molecule</u>, with the capacity to adhere to the surfaces it comes into contact with. This characteristic causes it to form a concave meniscus, as the outermost molecules adhere to the glass surface, while the surface tension of the water attracts the molecules from the centre downwards, causing the concavity.

Learn more:

Measuring with a graduated cylinder brainly.com/question/4070509

4 0
3 years ago
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Please I need help with questions 68 and 69 and it’s very hard and I’m struggling with it and if you need to see the picture big
SSSSS [86.1K]
Photosynthesis, how plants survive. Sunlight is absorbed.
7 0
3 years ago
Which products result from carbohydrate metabolism?
a_sh-v [17]

Answer:

pyruvate and acetyl-CoA

Explanation:

The first step of respiration reactions is glycolysis. When glucose is broken down in glycolysis, the first molecule that is produced is pyruvate. If pyruvate continue to aerobic respiration, it must enter the matrix of mitochondria and be oxidised to Acetly Co-A.

6 0
3 years ago
How is biomagnification related to pesticides?
malfutka [58]
<span>"One of the most common ways to control or eliminate pests is to use poisons that kill pests - pesticides." 
i prefer you check out this site, believe it or not i hate reading but this isnt that long and the answer is right in front of you!
https://www.slideshare.net/OhMiss/pesticides-and-biomagnification
</span>
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3 years ago
Which if the following conditions best match this graph:
postnew [5]
I say A they dont neither grow or lower. and if they do they go back to normal
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3 years ago
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