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3 years ago

Which of the following rivers is the world's busiest waterway?

2 answers:

4 0

The river that is considered as the world’s busiest waterway is the river of Seine, letter D. it flows directly into the English Channel. It is a 350 mile long arm of the Atlantic Ocean situated between the south coast of the United Kingdom and the north coast of France.

aliya0001 [1]3 years ago

3 0

D. The Seine. It's a 777 km long commercial waterway near Paris. Its very crowded because of the cruises that go along the river and because of its location near Paris.

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Area A is located close to a volcanic vent, but area B is far away. What is the expected distribution of iron ore deposits in ea

SCORPION-xisa [38]

Area A will have higher iron ore deposits than area B.

6 0

3 years ago

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In 10 minutes a heart can beat 700 times. At this rate, in how many minutes will a heartbeat 140 times? At what rate can a heart

Ivanshal [37]

Answer:

Heart will beat 140 times in 2 minutes.
Heart beats at a rate of 70 beats per minute.

Explanation:

In 0 minutes heart beats 700 times

hence in 1 minute it will beat 70010=70 times

and heart will beat 140 times in 14070=2 minutes

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3 years ago

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IgorC [24]

C, usually minerals can be found on just about every continent

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3 years ago

If the star Alpha Centauri were moved to a distance 10 times farther than it is now, its parallax angle would ______

Virty [35]

Answer: get smaller

Explanation:

Parallax is the angle formed by the observation lines to a very distant object from two separated points.

The procedure to measure this distance in the case of a star, is based on observing it from two different places far away from each other, and then through trigonometry reach to the following relationship:

$d=\frac{r}{sin \theta}$ (1)

Where:

$d$ is the distance from Earth to the observed star (in Parsecs $1pc=206265AU$ )

$r$ is the earth-sun distance that is equivalent to an astronomical unit (1AU=150000000km)

$\theta$ is the angle of the parallax (in arc seconds $''$ )

Now, the distance to an object (measured in parsecs) is the reciprocal of the parallax (measured in arcseconds). Then, in its simplified mode, the stellar parallax is given by the following equation:

$d=\frac{1}{\theta}$ (2)

As we can see, there is an inverse relation between the distance $d$ and the parallax $\theta$ :

$\theta=\frac{1}{d}$ (3)

Hence, if the distance is increased by a factor of 10, the parallax is decreased by a factor of 10.

In other words, the parallax angle gets smaller.

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4 years ago

What is the one major difference between the sun and the moon in our sky?

alexgriva [62]

The sun produces its own light whereas moon does not have its own light it reflects the light from the sun

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3 years ago