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3 years ago

The Middle Colonies relied heavily on

Social Studies

1 answer:

Studentka2010 [4]3 years ago

4 0

B. Lumber

(... it's a forest...)

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Both the Congress of Racial Equality and the Student Nonviolent Coordinating Committee

Pachacha [2.7K]

Answer:

B.) organized freedom rides in the South

Explanation:

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3 years ago

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Which island did Japan want to occupy to strengthen its position in the Pacific? A) New Zealand B) Tobogo C) Aruba D) Philippine

mars1129 [50]

I think the answer is D

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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

HURRY50POINTS!!!!

spayn [35]

Answer:

Explanation:America: Americans are super friendly and outgoing. They are likely to greet friends and acquaintances with a big hug. You could say that communication is very informal, whereas the French are more formal. France: Hugging is sometimes considered more intimate than kissing in France.

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3 years ago

¿Cuál es el nivel de consumo de combustibles fósiles?

Naddik [55]

Answer:

11 mil millones de toneladas.

Explicación:

11 mil millones de toneladas de combustibles fósiles son consumidos por todo el mundo en un año. Debido a la alta tasa de consumo de combustibles fósiles, la alta concentración de dióxido de carbono y dióxido de monóxido de carbono en el aire, que es la principal causa de la contaminación del aire. Debido al mayor uso de combustibles fósiles, las reservas se están desvaneciendo rápidamente y nos quedan combustibles fósiles durante 53 años si usamos 11 mil millones de toneladas de combustibles fósiles en un año.

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3 years ago