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3 years ago

When was the last Roman King overthrown?

Social Studies

1 answer:

siniylev [52]3 years ago

3 0

I'd say around 509 BC or 309 BC I can't remember but I'd say 509 BC

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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

Why do you feel planters were hesitant to grow different types of crops ?

Marat540 [252]

Answer:

During colonial times, agriculture was the basis of society in

South Carolina. South Carolina’s economy, politics, and social

standing revolved around the institution of slavery. Large

plantations used the headright method and slave labor to work the

fields. By 1860, South Carolina had the highest percentage of

slaveholders in the nation, even though few slave owners owned

large plantations. Most South Carolinians lived on family or

subsistence farms and did not own slaves. The majority of slave

owners only owned one to two slaves and often worked in the field

beside their slaves.

Explanation:

5 0

3 years ago

Read 2 more answers

Having to do with crops

erma4kov [3.2K]

Where is the question? :)

7 0

3 years ago

Which event most directly caused increasing instability in South Vietnam in 1955?

Pachacha [2.7K]

ANSWER:
the presidential election was rigged.

8 0

3 years ago

This empire conquered the people of Judah in 63 B.C.

amid [387]

D the romans= Rome that’s the answer

7 0

4 years ago