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musickatia [10]
3 years ago
12

When two stars are bound together gravitationally and orbit a common mass, they're known as

Physics
1 answer:
garik1379 [7]3 years ago
3 0
D. Binary Stars

Well, galaxies are not stars at all rather they are collection of stars, nebulae, globular clusters and stuff like this.
Meteoroids are something entirely different.
Constellations are the pattern of stars.
So, "Binary Stars" is the Right One.
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Using the idea of work done under gravity, the height of the building is 187 m.

<h3>Work done in a gravitational field</h3>

We must recall that the work done in a gravitational field is given by; mgh

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