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4 years ago

What causes solar winds?

2 answers:

4 0

The solar wind is a continuous outward stream of particles (mostly protons and electrons) from the sun's hot corona. ... These ejected particles become a powerful “gust” in the solar wind. When they reach the earth, they can cause severe space weather storms.

lakkis [162]4 years ago

3 0

The solar wind is a continuous outward stream of particles (mostly protons and electrons) from the sun's hot corona. .These ejected particles become a powerful “gust” in the solar wind. When they reach the earth, they can cause severe space weather storms.

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A sample of wood from the remains of a ship was found to contain 40.0% of C-14 as of ordinary wood found now. If the half-life p

kondaur [170]

Answer:

7628 y

Explanation:

Carbon-14 is radioactive and it follows the first-order kinetics for a radioactive decay. The first-order kinetics may be described by the following integrated rate law:

$ln(\frac{[A]_t}{[A]_o})=-kt$

Here:

$[A]_t$ is the mass, moles, molarity or percentage of the material left at some time of interest t;

$[A]_o$ is the mass, moles, molarity or percentage of the material initially, we know that initially we expect to have 100 % of carbon-14 before it starts to decay;

$k = \frac{ln(2)}{T_{\frac{1}{2}}}$ is the rate constant;

$t$ is time.

The equation becomes:

$ln(\frac{[A]_t}{[A]_o})=-\frac{ln(2)}{T_{\frac{1}{2}}}t$

Given:

$\frac{[A]_t}{[A]_o} = \frac{40.0 %}{100.0 %}$

$T_{\frac{1}{2}} = 5770 y$

Solve for time:

$t = -\frac{ln(\frac{[A]_t}{[A]_o})\cdot T_{\frac{1}{2}}}{ln(2)}$

In this case:

$t = -\frac{ln(\frac{40.0\%}{100.0\%})\cdot 5770 y}{ln(2)}$

$t = 7628 y$

3 0

4 years ago

Type the correct answer in the box.

RoseWind [281]

Answer:

Technology is the use of reliable knowledge for a practical purpose.

Ecology is the study of the natural world through observation and experimentation.

Explanation:

6 0

3 years ago

Satellite photos of Neptune and Uranus show that both planets have a bluish color. Which gas in their atmospheres gives them thi

Shtirlitz [24]

Answer:

Methane

Explanation:

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3 years ago

Why atomic mass doesn't depends upon number of electrons<br><img src="https://tex.z-dn.net/?f=%20%5C%5C%20" id="TexFormula1" tit

nikklg [1K]

Answer:

In fact, it turns out that the mass of an electron is so small relative to the masses of protons and neutrons that electrons are considered to have a negligible effect on the overall mass of an atom.

Explanation:

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6 0

3 years ago

What holds everything in place in the universe?

tresset_1 [31]

Answer:

Gravity

Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.

Explanation:

hope this helps

8 0

3 years ago

Read 2 more answers