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algol [13]
3 years ago
7

Which of these is most commonly found in its liquid form? A. Hydrogen B. Water C. Oxygen D. Helium

Biology
1 answer:
Vikki [24]3 years ago
5 0

Hellium

Explanation:

Helium-4 is unique in having two liquid forms. The normal liquid form is called helium I and exists at temperatures from its boiling point of 4.21 K (−268.9 °C) down to about 2.18 K (−271 °C). Below 2.18 K, thermal conductivity of helium-4 becomes more than 1,000 times greater than that of copper.

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Calculate how much primary antibody you need to add to 5.0 ml of TBST buffer to give a 1:3333 dilution of the primary antibody (
Viefleur [7K]

Answer:

1.5 micro liter.

Explanation:

Antibodies may be defined as the substance hat are produced by the immune cells of the body against the particular antigen. The antibodies concentration is helpful to determine the infection stages.

The amount of primary antibody can be calculated by teh following formula:

N1V1 = N2V2

Here, N1 = amount of primary antibody = 1, N2  is dilution factor  1/3333 and V2 is 5 ml = 5000 micro liter.

Then V1 can be find as follows;

V1 × 1 = 1/3333 x 5000

V1 = 1.5 micro liter.

Thus, the answer is 1.5 micro liter.

6 0
4 years ago
Which describes the basic structure of a fatty acid?
Butoxors [25]
The R-COOH. Unbranched hydrocarbon chain with carboxyl at one end. 


6 0
3 years ago
Virus? Living or not? If we use the image as an indicator, we might say living because A) proteins are present. B) it contains a
tester [92]

Answer: The correct answer is -

D) in a host, it is capable of reproduction.

Explanation:

Virus can be described as a microscopic, infective, non living agent that typically possesses genetic material (DNA or RNA) that is surrounded by a proteinaceous coat (capsid).

It can not replicate by its own and thus it uses host machinery for replication. In other words, it multiplies within host organism. This is the reason that it can be called as living.

Thus, option D) is the right answer.

6 0
3 years ago
Read 2 more answers
Petrochemicals include things like _____.
saveliy_v [14]
Petrochemicals include many things, I would say All of the above. Hope this helped! :)
8 0
4 years ago
Which of the following is a characteristic that could be applied to both living and nonliving things?
Schach [20]
The following that is a characteristic that could be applied to both living and nonliving things can contain mostly carbon, hydrogen, oxygen, and nitrogen. 
4 0
4 years ago
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