13-C
14-B
15-D
16-A
17-C
Hope that helps!
The answer is B. The Doppler Effect is used to calculate the velocity (speed) of something. Astronomers use it to see how fast stars and galaxies are moving away from us.
Answer: a person who searches for plant and animal species from which medicinal drugs and other commercially valuable compounds can be obtained.
Explanation: google
The number that Colorado River would have to downcut per year to form the mile-deep canyon in 4 million years is 0.40 millimeter per year.
Depth of canyon = 1 mile
Time taken = 4 million years
Based on the above information, the rate will be:
= Depth / Time taken
= 1 mile / 4 million years
= 0.25 mile / million year
Note tha<em>t 1 mile = 1609344 millimeter</em>
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Therefore, the rate will be:
= (0.25 × 1609344) / 1000000 years
= 0.40 millimeter / years
In conclusion, the rate is 0.40 millimeter per year.
Read related link on:
brainly.com/question/12759847
The correct answer is - 100 m and 2000 m.
The thermocline represents an abrupt, sudden, rapid, drop of temperature in a body of water. In the big bodies of water, like the oceans, the thermocline is the separation line between the upper layers of the water that are warmer and more wild, and the lower layers of the water that are colder and much more calmer. In this case, the thermocline appears between 100 meters and 200 meters, and we know that because it is between these two depths were we have the biggest difference in temperature drop, which in the given situation is 13 degrees.
