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3 years ago

14

The __________ of 1887 divided Native American land into 160-acre plots for families to farm, against the wishes of most Native

Americans.

1 answer:

iVinArrow [24]3 years ago

5 0

The answer is the “Dawes Act”.

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HELP PLEASE!!!!!!!!!!!!!!!!!!

Alexxandr [17]

Gunpowder was helping armies become stronger

were you reported for your question????

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3 years ago

Why might a reader have problems understanding a primary source?

denis-greek [22]

Many primary sources cannot be understood because of the language or they way they have written it. We can't always understand it because its from a culture completely different from our own. Reading primary sources requires your his historical imagination.

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3 years ago

Identify and describe the two defining concepts of political geography. (Site 1)

asambeis [7]

1. nation- sizable group with shared political aspirations who share a common root// common history

2. state- recognized political unit with permanently populated territory with BOUNDARIES and a government with sovereignty over domestic and international affairs

hope this helped I just did this chapter and got 100 on final test :))

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3 years ago

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

Que es la lengua oficial de un país

AnnyKZ [126]

El idioma que es muy común o que más gente habla

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3 years ago

Read 2 more answers