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svlad2 [7]
3 years ago
5

You are standing at position X. Click on the diagram that shows your position when you perceive a sound at the same frequency as

actually being produced by the siren.
Biology
1 answer:
Zarrin [17]3 years ago
5 0
This question related to the Doppler effect, which states that the incident frequency of waves from a moving source is different from the actual frequency. The point where the actual frequency is observed is when the source is right next to the observer.
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Select all that apply: Which of the following affect(s) the half-life of a radioactive substance?
frutty [35]

Answer:

The correct answer is option A, the type of isotope

Explanation:

The half life of a radioactive substance is a constant value and thus it is not affected by the temperature, catalyst or mass of the substance.  Basically it is the time taken by a radioactive substance to reduce its mass by half of its actual value. Radioactive decay takes place only when the atomic nucleus becomes unstable and thus the isotope type is the only factor which affects the radioactive decay of any element.  

8 0
3 years ago
What is the difference between an embryo and a fetus?
Ksivusya [100]
A embryo is the unborn child from when they were conceived to 10 weeks and fetus is the unborn child from 11 weeks till birth
5 0
3 years ago
PLEASE HURRY UP WILL GIVE BRAINLISET AND 30 POINTS THIS IS SCIENCE
diamong [38]

(1)

Troposphere – This is the densest layer and where weather events occur

Stratosphere – This is where the ozone layer is found. Some high altitude aircraft cruise in this layer.

Mesosphere – Temperatures drop with altitude in this layer

Thermosphere – This is where most of the meteorites that enter the earth’s atmosphere burn up. This layer takes up most of the Uv and X-rays from the sun. Most satellites orbiting earth are in this layer

Exosphere – almost akin to space due to the thinness of the layer. Molecules in the layer often escape into space

(2)

A ‘pause’ is a transition between the above-mentioned distinct layers. The tropopause, for example, occurs between the troposphere and the stratosphere and the stratopause between the stratosphere and mesosphere and thermopause is found between thermosphere and exosphere.

(3)

A temperature inversion is a rise in temperatures with altitude in a layer in the atmosphere. One layer exhibiting temperature inversion is the stratosphere. This is due to the ozone layer that absorbs UV light. The upper ozone absorbs most of the UV light, than lower ozone, exciting the molecules and making the higher altitudes in the layer to be warmer.

(4)

The ozone layer protects life on earth from the high energy UV radiation from the sun. UV is capable of causing double-stranded break on DNA resulting in genetic mutations on organisms. Most of these would be lethal. The Ozone absorbs most of the UV before it reaches earth's surface. Ozone is formed when an oxygen molecule reacts with another oxygen atom to form an O₃. The oxygen atoms are made from the splitting of an oxygen molecule by UV light.

Learn More:

For more on the atmosphere check out;

brainly.com/question/13633485

brainly.com/question/2846796

#LearnWithBrainly

5 0
3 years ago
NOBLE GASES HAVE A FULL OUTER ENERGY LEVEL AND ARE INACTIVE. THESE ATOMS ARE CONSIDERED BLANK
OverLord2011 [107]
Inert

That means it does not react with other atoms
4 0
3 years ago
Differences between DNA and RNA include which of the following? (1) RNA consists of one nucleotide
PilotLPTM [1.2K]
A is the correct answer.
6 0
3 years ago
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