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3 years ago

How do you think Perry's warships affected Japan's decision to trade with the United States?

1 answer:

4 0

It allowed us to be able to trade and get different things that we were not able to get in America.
The warship guarantees Japanese interest in trading with united states due to the projected sense of security. This allowed united states to possess unique commodities that we never possessed before such as Slik and porcelain.

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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>

8 0

3 years ago

How could this document help you argue for abolishing the Electoral College?

Aloiza [94]

Answer:

The electoral collage is necessary. If we didnt have the electoral collage we would have california and new york deciding the president. and its full of Democrats. dosnt even give republican canidates a chance. its biased and unfair. the electoral collage was made carefully to allow the presidents to be chosen.

8 0

3 years ago

Read 2 more answers

The ____ paid peasants to produce products.

Masja [62]

The cottage industry paid peasants to produce products

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3 years ago

What is the role of a gatekeeper

Basile [38]

One that is in charge of passage through the gate.

6 0

2 years ago

What was life for the slaves

Vera_Pavlovna [14]

Answer:

Plantation slaves lived in small shacks with a dirt floor and little or no furniture. Life on large plantations with a cruel overseer was oftentimes the worst. However, work for a small farm owner who was not doing well could mean not being fed. The stories about cruel overseers were certainly true in some cases.

Explanation:

5 0

3 years ago