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tatuchka [14]
3 years ago
9

Lable the parts of the heart

Geography
1 answer:
wlad13 [49]3 years ago
6 0
There are 10 parts of a heart:

Aorta
Superior Vena Cava
Pulmonary Arteries
Left Atrium  
Right Atrium 
Right Ventricle
Left Ventricle 
Right Coronary Vein
Right Coronary Artery 
Apex
 

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What influences the level and type of countries government
FinnZ [79.3K]

Well first off the founders, any amending documentation, and input by the civilian population. From there they can grow, fall, adapt, or die. In seemingly infinite ways the gov. or population can be changed.

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Need help asap!
slava [35]

More than 75 percent

Explanation:

Let us carefully analyze this problem:

The half life of the rubidium isotope = 50 billion years

   The half-life of a radioactive isotope is the time it takes for it to decay to half of its original amount.

  Every 50years, we know that a rubidium isotope would split into half.

Initially when the isotope was formed, we would only have the parent atoms there. There wont be any daughter;

  ratio of parent to daughter = 100 : 0

When the isotope decays to half; we would have equal number of parent and daughter:

  ratio of parent to daughter at half life = 50 : 50

The age of the earth is about 4.6billion years;

this is;

          \frac{4.6}{50} x 100 = 9.2% of the half-life of the rubidium isotope.

At this time, we should know that only 9.2 percent of the daughter would have been formed.

The remaining parent would be 100 - 9.2 = 90.8% would still be left undecayed.

The ratio of parent to daughter  = 90.8 : 9.2

This is more than 75% of the parent

learn more

Radioactive decay brainly.com/question/10125168

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3 years ago
what is the weathering process that occurs when rocks expand in the heat of the day and contract during the cool night-time​
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Answer:

Temperature changes can also contribute to mechanical weathering in a process called thermal stress. Changes in temperature cause rock to expand (with heat) and contract (with cold). As this happens over and over again, the structure of the rock weakens. Over time, it crumbles.

Explanation:

i think this will help you

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