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viktelen [127]
3 years ago
6

A biologist is researching antibodies, which are tiny natural proteins in the blood of animals, and she is using methods develop

ed twenty years ago. These methods allow her to study the antibodies even though they are very small, approximately 10–9 m in size. The biologist tells her friend, who is a physicist, that she is now a nanotechnologist. Her friend disagrees. Why does the physicist disagree?
Physics
2 answers:
Sedbober [7]3 years ago
8 0

Answer:

Her friend disagrees because the biologist is not working with nanotechnology which would enable her to be a nanotechnologist.

The biologist is only working with nano antibodies.

Lady_Fox [76]3 years ago
5 0

Answer:

B. The biologist is not working with nanotechnology.

Explanation:

I got it right on edge.

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Dennis_Churaev [7]
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2 years ago
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An iron atom (Fe) has 26 protons in it. If the atom has 20 electrons in it, explain what type of charge it has and how you can t
gogolik [260]

Answer:

The iron atom has a positive charge, making it a cation.

Explanation:

The atom has a nucleus, where the protons and neutrons, which are the subatomic particles with the highest mass, are located. Practically all the mass of the atom is concentrated in the nucleus.Protons have a positive electrical charge, while neutrons have no charge.

Electrons move around the nucleus with other negatively charged particles.

An iron atom (Fe) has 26 protons and 20 electrons in it.  That is, there are 6 more protons than electrons. As mentioned, protons are positively charged. So <u><em>the iron atom has a positive charge, making it a cation</em></u>.

4 0
3 years ago
1. A piece of metal weighs 50.0 N in air, 36.0 N in water, and 41.0 N in an unknown
denis23 [38]

Answer:

a) 3.37 x 10^{3} kg/m^3

b) 6.42kg/m^{3}

Explanation:

a) Firstly we would calculate the volume of the metal using it`s weight in air and water , after finding the weight we would find the density .

Weight of metal in air = 50N = mg implies the mass of metal is 5kg.

Now the difference of weight of the metal in air and water = upthrust acting on it = volume (metal) p (liquid) g = V (1000)(10) = 14N. So volume of metal piece = 14 x 10^{-4}  kg/m^{3}. So density of metal = mass of metal / volume of metal = 5 / 14 x 10^{-4}  kg/m^{3} = 3.37 x 10^{3} kg/m^3

b) Water exerts a buoyant force to the metal which is 50−36 = 14N, which equals the weight of water displaced. The mass of water displaced is 14/10 = 1.4kg Since the density of water is 1kg/L, the volume displaced is 1.4L. Hence, we end up with 3.57kg/l. Moreover, the unknown liquid exerts a buoyant force of 9N. So the density of this liquid is 6.42kg/m^{3}

3 0
3 years ago
A scientist wants to know if adults prefer watching movies in a theater or in their home. He interviews 500 people leaving a loc
Alex777 [14]

Answer:

The location of the survey is biased.

Explanation:

If someone left a movie theater, it is most likely because he likes watching movies there. A better place to interview would be on the streets, as it’s less biased there

8 0
3 years ago
What does human ethics mean?<br> Get a little long<br><br> Thanks
pentagon [3]

Explanation:

Ethics, also called moral philosophy, the discipline concerned with what is morally good and bad and morally right and wrong. The term is also applied to any system or theory of moral values or principles. Its subject consists of the fundamental issues of practical decision making, and its major concerns include the nature of ultimate value and the standards by which human actions can be judged right or wrong.

hope it helps!

5 0
3 years ago
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