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noname [10]
3 years ago
7

What do scientists use to look at astronomical bodies?

Biology
1 answer:
love history [14]3 years ago
7 0
D <span> microscopes  hope it helps </span>
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What is the average atomic mass of a sample that has two isotopes, one with a mass of 21 amu at 62% abundance and another with a
motikmotik

Answer:

Average atomic mass = 21.38 amu.

Explanation:

Given data:

Mass of first isotope = 21 amu

Abundance of first isotope = 62%

Mass of second isotope = 22 amu

Abundance of second isotope = 38%

Average atomic mass = ?

Solution:

Average atomic mass  = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass  = (62×21)+(38×22) /100

Average atomic mass =  1302 +836 / 100

Average atomic mass = 2138 / 100

Average atomic mass = 21.38 amu.

3 0
3 years ago
Explain why facilitated diffusion does not require energy from a cell.
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The solute can move "downhill," from districts of higher to lower fixation, depending on the specificity of the protein bearer to go through the film. This procedure is called uninvolved transport or encouraged dissemination, and does not require vitality.

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3 years ago
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What is miner segment ? ​
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Answer:

Hi, There!

The minor segment is the region bounded by the chord and the minor arc intercepted by the chord. The major segment is the region bounded by the chord and the major arc intercepted by the chord.

xXxAnimexXx

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7 0
3 years ago
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The major blood vessels that supply the skin lie between the dermis and the epidermis.
stiv31 [10]
The answer to this question would be: b. False
The area between dermis and epidermis is small and get oxygen from nearby capillary vessel bed, not a major blood vessel. You can find the major blood vessel in the dermis area. This vessel will supply enough blood to the skin, glands, and receptors inside the dermis.
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3. If a forest ecosystem consists of plants, animals, and organisms that decompose
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Ekosistem merupakan work yang dapat dilihat dengan jelas deg-degan during yummy

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3 years ago
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