Chemistry, 15.02.2021 14:00 derrekdream123
Astronomers have developed several ways to measure the vast distances between Earth and the stars and galaxies. What do you know about two of these
techniques?
An astronomical unit (A. U.) is the average distance between the Earth and the Sun.
Our galaxy, the Milky Way, is about 150 light-years across
An astronomical unit is about 93 million kilometers.
Astronomers measure distances to objects which are outside our solar system in light-years.
The A. U. is used to measure distance within our solar system.
A light-year (ly) is the distance that light can travel in one year in a vacuum.
Answers: 3
Chemistry, 21.06.2019 19:00
Describe the chemical reaction based on the chemical equation below. also, explain whether the equation is balanced.
Answers: 1
Chemistry, 21.06.2019 21:00
Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?
Answers: 1
Chemistry, 21.06.2019 22:00
Which of the following statements is true about planck’s law
Answers: 1
Chemistry, 22.06.2019 13:50
Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.
Answers: 3
Astronomers have developed several ways to measure the vast distances between Earth and the stars an...
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