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Olegator [25]
3 years ago
12

Define light year, and explain how and why light years are used to measure distance in the universe

Biology
1 answer:
Paha777 [63]3 years ago
6 0

A light-year is the distance that light travels in empty space in one year. Since the speed of light is about 300,000 km per second (about 186,000 miles per second), then a light year is about 10 trillion kilometers (about 6 trillion miles).

The light year is used in astronomy because the universe is huge. Space objects such as stars and galaxies may be hundreds, thousands or millions of light years away.

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weqwewe [10]
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3 years ago
Compared to other receptors, what makes steroid hormone receptors unique?
Dafna11 [192]

Answer: b)Steroid hormone receptors are located within the cytoplasm of a cell.

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6 0
3 years ago
Genes contain instructions for assembling Question 56 options: a. purines. b. nucleosomes. c. proteins. d. pyrimidines.
sergejj [24]

Answer:

c. Proteins

Explanation:

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4 0
3 years ago
Read 2 more answers
What is a drug found in tobacco that speeds up heartbeat? * 5 points?
Darya [45]
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5 0
3 years ago
4. What kind of bond is created by a weak electrical attraction between polar molecules?
Rzqust [24]

Answer:

hydrogen bond

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by weak electrical attraction between two polar molecule hydrogen bond is developed between them

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8 0
2 years ago
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