Answer
Calculate the amount of heat needed to melt 2.00 kg of iron at its melting point (1809 K), given that: ?Hfus = 13.80
Answer:
The diagram shows refraction, and medium 1 is less dense than medium 2.
Explanation:
- Reflection occurs when a light ray hits a surface and bounces back into the same medium
- Refraction occurs when a light ray crosses the interface between two different mediums, changing direction
From the diagram, we clearly see that this is a case of refraction, since the light ray crosses the boundary between two mediums.
The direction of a light ray in refraction is given by Snell's Law:
(1)
where
n1 and n2 are the index of refraction of the two mediums: a higher index of refraction means a higher density for the medium
are the angles of the light ray in medium 1 and medium 2, measured with respect to the normal to the interface
We can rewrite eq. (1) as
From the diagram, we see that
so
and so
which means
so, medium 2 is denser than medium 1, and the correct answer is
The diagram shows refraction, and medium 1 is less dense than medium 2.
Answer:
yes
Explanation:
I think so because it not mention in the law
Answer: Option (c) is the correct answer.
Explanation:
Atomic number of hydrogen is 1 and one dot in its lewis structure displays only one electron. So, in order to complete its octet it needs one more electron.
Atomic number of carbon is 6 and its electronic distribution is 2, 4. Carbon needs 4 more electrons in order to complete its octet.
Atomic number of oxygen is 8 and its electronic distribution is 2, 6. In order to complete octet, oxygen needs 2 more electrons.
Atomic number of fluorine is 9 and its electronic distribution is 2, 7. In order to complete octet, fluorine needs 1 more electron.
Hence, we can conclude that out of the given options, lewis dot structure of oxygen atom needs 2 more electrons in its outermost shell.