3 years ago

Name 2 objects found outside of the Milky Way galaxy.

Chemistry

2 answers:

leonid [27]3 years ago

7 0

Answer:

meteors, other galaxies, stars, planets

Explanation:

rusak2 [61]3 years ago

7 0

Answer:

The Milky Way is part of a cosmic neighborhood. Outside of the Milky Way are other galaxies and there are also extragalactic planets or extragalactic exoplanets.

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Uranium-238 decays to lead-206 with a half-life of 4.5 x 109 yr. Determine how much uranium-238 decays in milligrams (to three s

Mamont248 [21]

Answer:

2.15 mg of uranium-238 decays

Explanation:

For decay of radioactive nuclide-

$N=N_{0}.(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}$

where N is amount of radioactive nuclide after t time, $N_{0}$ is initial amount of radioactive nuclide and $t_{\frac{1}{2}}$ is half life of radioactive nuclide