1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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>




You might be interested in
the ___ refers to the soviet's strategy of sealing of sealing off Eastern Europe countries from Western democracies
mina [271]
I think it would be the Berlin Wall
6 0
3 years ago
Read 2 more answers
When did the supercontinent pangaea start to break up?
Delicious77 [7]

The correct answer is -175 million years ago.

Pangaea was a supercontinent which was consisted of all the continental masses we know nowadays, just they were all merged into one very large land mass. This supercontinent started to form from the land masses that existed prior to it, and because of the tectonic activity they merged roughly around 335 million years ago. The continent existed during the Paleozoic era, as well as the early Mesozoic era.

With the breaking up of this continent because of the tectonic activity, it split initially into two large continents, Laurasia on the north, and Gondwanaland on the south. With the later break up, Laurasia split into Eurasia and North America, while Gondwanaland split into South America, India (which later moved towards Eurasia and merged with it), Antarctica, and Australia. The formation of the modern day continents also resulted in the formation of multiple oceans instead of one.

3 0
3 years ago
Why did the United Nations rename the ‘Middle East’? What name did it<br> give the region?
-Dominant- [34]

Answer:

1. Because they wanted have communications.

2. The term "Middle East" originated from the same European perspective that described Eastern Asia as "the Far East." The Middle East denotes the transcontinental area between Western Asia and Egypt.

8 0
2 years ago
Why did approximately 800,000 people die in Rwanda between April and July 1994?
Lesechka [4]
The answer is D. It happened because of ethnic tensions that led to Genocide against the Tutsi which was organized by the members of the Hutu majority government. It killed approximately 500,000 to 1,000, 000 Rwandans between April and mid July of year 1994.
5 0
3 years ago
Suppose that two stars in a binary star system are separated by a distance of 80 million kilometers and are located at a distanc
jonny [76]

Answer: 1) Angular separation equals 0.0000031 degrees

2) Angular separation in arc -seconds equals 0.011156"

Explanation:

For 2 stars separated by a distance 'S' and at a distance 'D' from the earth the angular separation in radians is given

\theta _{rad}=\frac{S}{D}

Applying values we get

\theta _{rad}=\frac{80\times 10^{6}}{150\times 9.46\times 10^{12}}\\\\\therefore \theta _{rad}=\frac{1}{18487500}radians

Now we know that 'π' radians equals 180 degrees thus the above value in degrees shall be equal to

\therefore \theta _{degrees}=\frac{1}{18487500\times \pi }\times 180^{o}=0.0000031^{o}

2)

The angular separation in arc- seconds is given by

\theta ''=\theta ^{o}\times 3600\\\\\theta'' = 0.0000031\times 3600=0.011156"

8 0
3 years ago
Other questions:
  • Is this correct?!!? :D
    5·1 answer
  • Which type of succession can take place after lava flow cools and hardens into new land, or a glacier recedes exposing new land?
    10·2 answers
  • Human activities that do not cause an imbalance in the water cycle and the carbon cycle are considered eco-friendly. The activit
    7·2 answers
  • Africa's most prominent monsoon circulation can be found in the ________ part of the continent.
    11·1 answer
  • During most of the year, the air over Daytona beach contains a great amount of moisture. The air is said to be humid. Which of t
    14·1 answer
  • Apart from physical geography, human geography name the other branch​
    6·1 answer
  • The Plateau of Tibet, the world's largest plateau, is located in which country?
    9·2 answers
  • What causes the melting point of rock to increase as you approach the center of earth
    9·1 answer
  • Pls Help meeeee There is an old saying, “Earthquakes don’t kill people, buildings do.” Write a paragraph to explain the meaning
    10·2 answers
  • Bangladesh is a country of rivers and floods but groundwater is still a vital resource because it provides bacterially safe wate
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!