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Bezzdna [24]
3 years ago
5

What might a safety hazard include?

Social Studies
1 answer:
Lerok [7]3 years ago
6 0
Read the definition, it will become more clear.
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Que relaciones tienen cada uno de los cuerpos astrales en el universo? urgente!!! por favor ​
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Answer:

sorry

Explanation:

i am confused on what you are asking?

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What did the First Continental Congress decide?
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Answer: D

Explanation:

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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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Why Kwanzaa is celebrated?
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It’s a celebration of African American culture starting December 26 until January 1st
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What is family resemblance?
grigory [225]

Answer:

Family resemblance (German: Familienähnlichkeit) is a philosophical idea made popular by Ludwig Wittgenstein, with the best known exposition given in his posthumously published book Philosophical Investigations (1953).[1] It argues that things which could be thought to be connected by one essential common feature may in fact be connected by a series of overlapping similarities, where no one feature is common to all of the things. Games, which Wittgenstein used as an example to explain the notion, have become the paradigmatic example of a group that is related by family resemblances. It has been suggested that Wittgenstein picked up the idea and the term from Nietzsche, who had been using it, as did many nineteenth century philologists, when discoursing about language families.[2]

Explanation:

5 0
3 years ago
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