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1 year ago

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In the geologic past, volcanic eruptions have had an impact on the availability of resources. How can volcanic eruptions impact

the availability of resources?.

1 answer:

natka813 [3]1 year ago

3 0

Volcanic eruptions can destroy building that store resources, burn trees, kill animals and make land not suitable for farming etc

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Calculate the amount, in grams, of an original 300-gram sample of radioactive isotope Potassium-40 remaining after

Aleksandr [31]

Answer:

The current amount of the Potassium-40 sample is approximately 37.521 grams.

Explanation:

The amount of the sample of the radioactive isotope decays exponentially in time, the amount of mass of the sample as a function of time ( $m (t)$ ), in grams, is described below:

$m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$ (1)

Where:

$m_{o}$ - Initial mass, in grams.

$t$ - Time, in years.

$\tau$ - Time constant, in years.

The time constant can be found from half life ( $t_{1/2}$ ), in years, described in statement:

$\tau = \frac{t_{1/2}}{\ln 2}$ (2)

If we know that $m_{o} = 300\,g$ , $t = 3.9\times 10^{9}\,yr$ and $t_{1/2} = 1.3\times 10^{9}\,yr$ , then the current amount of the sample is:

$\tau = \frac{1.3\times 10^{9}\,yr}{\ln 2}$

$\tau \approx 1.876\times 10^{9}\,yr$

$m = (300\,g)\cdot e^{-\frac{3.9\times 10^{9}\,yr}{1.876\times 10^{9}\,yr} }$

$m\approx 37.521\,g$

The current amount of the Potassium-40 sample is approximately 37.521 grams.

4 0

3 years ago

THE OTHER ANSWERS ON BRAINLY WERE INCORRECT SO DONT ANSWER UNLESS U KNOW

liberstina [14]

Answer:

probably standing living

Explanation:

hope thats correct!

mark me brainliest tho :D

5 0

3 years ago

Which of the following examples best represents a geographic study on a large scale?

jasenka [17]

Answer:

cloropleth map, regional

Explanation:

What are the options

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3 years ago

How far away is the moon from the earth ?

Mice21 [21]

Answer:
384,400 km
Radius: 1,737

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3 years ago

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The two peaks, on the Island of Hawai’i are ________ and ________.A. Mauna Kea/Mauna LoaB. Mauna Mahalo/Mauna PomaikaC. Mauna La

BartSMP [9]

Answer:

A. Mauna Kea/Mauna Loa

Explanation:

Mauna Kea and Mauna Loa are the two peaks of Hawai’i Island. the height of Mauna Kea is 4,206 meters while Mauna Loa has a height of 4,170 meters. Mauna Loa is one of the five volcanoes of Hawai’i which is inactive about 35 years. Mauna Kea is also inactive mountain of Hawai’i and considered the largest mountain of the world if it is measure from base because most of its part are present under water.

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3 years ago