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3 years ago

Do you apply for college through your school email or personal one

Social Studies

1 answer:

Stella [2.4K]3 years ago

5 0

I either one should work but I would reccomend your personal one.

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Suppose you find a rock that contains 10 micrograms of radioactive potassium-40, which has a half-life of 1.25 billion years. By

attashe74 [19]

Answer:

The rock is 3.75 billion years ago.

Explanation:

Given that:

Half life = 1.25 billion years

1 billion years = 10⁹ years

So,

Half life = 1.25 × 10⁹ years

$t_{1/2}=\frac {ln\ 2}{k}$

Where, k is rate constant

So,

$k=\frac {ln\ 2}{t_{1/2}}$

$k=\frac {ln\ 2}{1.25\times 10^9}\ year^{-1}$

The rate constant, k = 5.5452 × 10⁻¹⁰ years⁻¹

Initial amount [A₀] = 80 micrograms

Final amount $[A_t]$ = 10 micrograms

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

So,

$10=80\times e^{-5.5452\times 10^{-10}\times t}$

$80e^{-5.5452\times \:10^{-10}x}=10$

$\frac{80e^{-5.5452\times \:10^{-10}x}}{80}=\frac{10}{80}$

$\ln \left(e^{-5.5452\times \:10^{-10}x}\right)=\ln \left(\frac{1}{8}\right)$

$x=\frac{10^{10}\times \:3\ln \left(2\right)}{5.5452}=3.75\times 10^9$

So,

<u>The rock is 3.75 billion years ago.</u>

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3 years ago

All scientific models, including economic models, simplify reality in order to improve our understanding of it.

wariber [46]

This statement is True.

Hope this helps!

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3 years ago

If abortion rights are overturned, what kind of disaster will those underage girls be violated

Dimas [21]

No type of disaster will be experienced by the underage girls if the abortion rights are overturned.

<h3>What is the abortion rights?</h3>

These are right to privacy to abort a foetus which was made into law because of the Federal ruling in Roe Vs Wade.

However, because of the abortion rights, there would not be a violation on the underage girl right because they are still underage before the law.

Read more about abortion rights

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2 years ago

Describe Descartes' views of the mind-body problem and his major contributions to the beginnings of modern science, particularly

lord [1]

There are a lot of contributions of Rene Descartes. René Descartes conclusive argument was that the nature of the mind which is thinking and non-extended thing is said to be very different from that of the body.

<h3 /><h3> What was Descartes view on the mind-body problem? </h3>

A key and efficient lasting legacies of Descartes' philosophy is his work was that mind and body are really different. His thesis called “mind-body dualism.”

He was known to be the man who invented analytical geometry and brought about skepticism as a key part of the scientific method.

His conclusive argument was that the nature of the mind which is thinking and non-extended thing is said to be very different from that of the body and that their function is not the same.

Learn more about Rene Descartes from

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3 years ago

A viewer was asked how they felt about the Super Bowl halftime show. The viewer did not actually watch the halftime show, but di

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Answer: The two step flow of communication

Explanation:

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2 years ago