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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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Given that lines a and b are parallel and that m∠4 = 128°, find m∠7.
vesna_86 [32]
<span>Since lines a and b are parallel and that m∠4 = 128°, therefore:

m<7 would be:

m<7 = 180 - m<4 = 180 - 128 = 52 degrees

Therefore, the measure of angle 4 would be 52 degrees.

I hope my answer has come to your help. God bless and have a nice day ahead!
</span>
8 0
3 years ago
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Why are water vapor and aerosols important constituents of earth's atmosphere?
natta225 [31]

Water vapor is important because it is the source of all clouds and precipitation and like carbon dioxide, it is also a heat absorber. Aerosols are important bc many acts as surfaces on which water vapor can condense, an important function in the formation of clouds.

Water vapor, steam, or steam is the gas phase of water. The state of water in the hydrosphere. Water vapor is produced by evaporation or boiling of liquid water or sublimation of ice. Water vapor, like most components of the atmosphere, is transparent. Under typical atmospheric conditions, water vapor is continuously produced by evaporation and removed by condensation. It is less dense than most other components of air and causes convection currents that lead to cloud formation.

As part of the Earth's hydrosphere and the water cycle, it is particularly abundant in the Earth's atmosphere, where it acts as a greenhouse gas and warming feedback, and is a more global gas than non-condensable gases such as carbon dioxide and methane. Contribute to the greenhouse effect. The use of water vapor as steam has been important since the Industrial Revolution as a major component of cooking and power generation and transportation systems.

Learn more about Water vapor here: brainly.com/question/11226635

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5 0
2 years ago
The climate of Eastern Central Europe is mainly _____.
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<span>The climate of Eastern Central Europe is continental. Continental climates occur in areas situated in the Northern Hemisphere’s east and north western coasts. This climate has three types namely warm and cool summer, and subarctic. Extreme weather conditions happen in regions having this type of climate.</span>

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3 years ago
Which Han leader began to rule after the collapse of the Qin dynasty in 206 BCE?
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Right as the Han Dynasty began, Liu Bang took over. Then, after him, was Han Wuidi!
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What is the longitude of the international data line ?
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Answer: 180 degrees longitude

Explanation: I just looked it up
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