2 years ago

What do we call the small changes that

Physics

1 answer:

Lelu [443]2 years ago

6 0

Answer:

The "butterfly Effect"

Explanation:

The "butterfly effect" will probably have big changes in the future.

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A car speeds up from 12.0 m/s to 16.0 m/s in 8.00s what is the acceleration

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Answer:

0.5m/s²

Explanation:

acceleration =v-u/t

=(16-12)/8

=4/8

acceleration =0.5m/s²

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Which of the following is an electromagnetic wave characteristic which is similar to a particle

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3 years ago

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How many different types of plant and animal life exist in a given habitat.

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An organism lives in the darkest aquatic ecosystem, where light cannot reach. Which ecosystem is this organism most likely in?

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The deep sea vents at the very bottom of the ocean. The thermal vent communities as otherwise stated.

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Consider a satellite in a circular orbit around the Earth. If it were at an altitude equal to twice the radius of the Earth, 2RE

Elenna [48]

Answer:

$v=\sqrt{\frac{gR_E}{2}}$

Explanation:

Satellites experiment a force given by Newton's Gravitation Law:

$F=\frac{GMm}{r^2}$

where M is Earth's mass, m the satellite's mass, r the distance between their gravitational centers and G the gravitational constant.

We also know from Newton's 2nd Law that <em>F=ma, </em>so putting both together we will have:

$ma=\frac{GMm}{r^2}$

$a=\frac{GM}{r^2}$

If we are on the surface of the Earth, the acceleration would be g and $r=R_E$ (Earth's radius):

$g=\frac{GM}{R_E^2}$

Which we will write as:

$gR_E^2=GM$

If we are on orbit the acceleration is centripetal ( $a=\frac{v^2}{r}$ ), so we have:

$\frac{v^2}{r}=a=\frac{GM}{r^2}=\frac{gR_E^2}{r^2}$

$v^2=\frac{gR_E^2}{r}$

$v=\sqrt{\frac{gR_E^2}{r}}$

And if this orbit has a radius $r=2R_E$ we have:

$v=\sqrt{\frac{gR_E^2}{2R_E}}=\sqrt{\frac{gR_E}{2}}$

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3 years ago

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