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matrenka [14]
3 years ago
10

Pluto's mass was poorly known before 1978. what happened in that year to change this

Geography
1 answer:
iragen [17]3 years ago
5 0
<span>The answer is ‘The return echo of a radar pulse, sent many years before, returned to Earth allowing a Doppler shift measurement of its rotation rate’.  This allowed the astronomers to  calculate its centripetal force hence able to derive force by using the law of universal gravitation. </span>




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Brainiest for whoever answer correctly.
olga2289 [7]

Answer:

B. Death Valley, CA

Explanation:

Here are the elevations of each location:

Key West, Florida 18 feet

Death Valley, California -282.2 feet

Seattle, Washington 175 feet

Corpus Christi, Texas 7 feet

Because Death Valley sits at -282.2 feet below sea level, the lowest elevation, <u>B is the answer</u>.

Tip: Without knowing the exact elevations of each location, we could assume that a <em>valley</em> would be lowest.

8 0
3 years ago
Echo sounding is useful for:
Anestetic [448]
Th correct answer is letter A. Echo sounding is very useful for depth profiles where SONAR is used to determine the depth of water through the transmission of sound pulses. It is calculated by checking the interval between the mission and the pulse that is recorded within the SONAR device.
7 0
3 years ago
Discuss the relationship between circle and an ellipse ​
avanturin [10]

Answer:

circle vs eclipse - down below!!

Explanation:

a circle has the same distance between a center, but an eclipse does not have the same distance between a center. AND, an circle has a fixed radius that stays solid, but a eclipse does not.

7 0
2 years ago
Which three Southwest Asian countries are NOT Arab?
alex41 [277]
Iran is the only country that I found that wasn’t Arab. Sorry...
6 0
3 years ago
15. A pluton is a A. channel way for rising magma B. intrusion of magma into fractions C. man-made rock D. large igneous rock bo
atroni [7]

Answer:

B. intrusion of magma into fractions

Explanation:

A pluton is a type of rock that is formed when magma cools and solidifies underground, they are an intrusive igneous rock (forced into other layers of rock), usually in cracks. The three main types of pluton are bysmalith (cylindrical), lopolith (mushroom-shaped), and laccolith (blister-shaped).

Because magma is under high pressure and takes a long time to cool, it allows time for the formation of large crystals. Therefore, plutonic rocks have coarse-grained crystals that come in many different colors and sizes. A good example is granite.

<em>Considering this information we can conclude that pluton is not manmade rock, they come in different sizes (not only large) so the correct answer is B. intrusion of magma into fractions. </em>

I hope you find this information useful and interesting! Good luck!

5 0
3 years ago
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