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Anastasy [175]
3 years ago
13

Which type of electromagnetic radiation is the primary cause of sunburns?

Biology
2 answers:
denis-greek [22]3 years ago
7 0

Answer:

Ultravoilet radiations (UV rays).

Explanation:

Sunburn is caused by the Ultravoilet radiations, either cause from the sun or the artificial source like welding arcs and tanning lamps etc. Ultravoilet radiations is a type of electromagnetic radiations with wavelength 10nm-400nm. It is present in the sunlight and contributes 10% output from the sun. It is a reaction of the body to direct DNA damage from UVB light.

Uv radiations is a powerful attack on the skin, and may cause skin cancer. It can also cause eye problems, they can cornea to become inflamed or burned.

siniylev [52]3 years ago
5 0
Ultraviolet radiation is the primary cause of sunburns
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At which latitude would the sun be directly overhead at noon on April 21?
Oksana_A [137]

Answer: At 23.5°N.

Explanation:

Hi, the answer is 23.5°N.

The Tropic of Cancer is the circle marking the latitude 23.5 degrees north, where the sun is directly overhead at noon on June 21, the beginning of summer in the northern hemisphere.

The Tropic of Cancer, is also referred to as the Northern Tropic.

The Tropic of Cancer's position is not fixed, but constantly changes because of a slight wobble in the Earth's longitudinal alignment relative to its orbit around the Sun.

7 0
3 years ago
. How many electrons are in the n = 2 shell of the oxygen atom before bonding? eight electrons 2. What is the maximum number of
balandron [24]

Answers

1. 8 electrons

2. 10 electrons

3. 10 electrons

4. 8 from the oxygen atom and 1 from each of the 2 hydrogen atoms

5. 4 hydrogen bonds

Explanation

The atomic number of oxygen is 8 thus it has a total of 8 electrons. When writing the electron configuration for the oxygen, the first n shell requires two electrons to complete the 1st orbital. The fact that 1s holds a maximum of 2 electrons the next 2 electrons of oxygen goes to 2s orbital. The 2s orbital takes a maximum of two electrons and the remaining 4 electrons occupy the 2p orbital. The configuration formed will be 1s² 2s² 2p4 .The maximum number of electrons in the second shell is 2n²=2×2² =8 from the formula 2n² (the maximum number of electrons in a shell). The total number of electrons in the second shell is 2(in s orbital) +4 (in p orbital) =6.The number of unpaired electrons is 8-6=2

A water molecule has four hydrogen bonds, because it is made up of two hydrogen atoms and an oxygen atom. A water molecule has 10 protons and 10 electrons thus it is neutral. In the water molecule there is formation of covalent bonds where oxygen atom and hydrogen atoms share electrons though the sharing is not equal. In the covalent bond, the oxygen atoms attract electrons more than the hydrogen atoms.


7 0
3 years ago
Read 2 more answers
One of the ways that acid rain is harmful is _____.
tankabanditka [31]
I would go with choice A) because today u don't just touch acid when u feel like it because the chemicals can burn your skin off to the bone itself and even animals.
3 0
2 years ago
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Help me please fast......................,......
Likurg_2 [28]
D. TT x tt. When using a punnett square and substituting with the different genotypes, all of them will be Tt. And since T is the dominant trait, the offspring will be very tall.
7 0
3 years ago
PLS HELP ASAP, ILL MARK BRAINLIEST IF ITS A REAL ANSWER. LOOK AT THE PICTURE.
suter [353]

Answer:

Why is healthy skin important? Healthy skin is important because it is your first line of defense against bacteria and other pollutants in the environment. Healthy skin is more resilient when faced with external stresses, serves as an important sensory organ and helps to regulate our body temperature.

The outermost layer of skin, called the epidermis, produces a thin barrier layer called the stratum corneum. This layer varies throughout the body in its structure, thickness, composition and functional properties. For example, the skin on your palms and soles is thicker than on your face.

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Explanation:

5 0
3 years ago
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