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kogti [31]
3 years ago
9

Dr. james van allen and his group of united states scientists discovered a set of ___________. magnetic equators planets magneti

c lines radiation belts
Physics
2 answers:
Blizzard [7]3 years ago
8 0

Answer: Radiation belts

Explanation :

Dr. James Van Allen was an American space scientist. Dr. James Van Allen and his group of united states scientists discovered a set of radiation belts. These belts are also known as Van Allen belts.

These belts are invented in the US when the first US satellite had been launched in 1958.

So, the correct option is (d) " radiation belts ".

Fofino [41]3 years ago
3 0

RADIATION BELTS....... I think but it should be radiation belt

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Answer:

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2 years ago
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2 years ago
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kodGreya [7K]

C. The opportunity cost of a student who is staying up all night to study for an exam that he has to take in the early morning is sleep or rest.

<h3>What is law of opportunity cost?</h3>

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As the student gives up his sleep or night rest in the place of his exam preparation, we say that the opportunity cost is the sleep or rest.

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Learn more about opportunity cost here: brainly.com/question/8846809

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7 0
1 year ago
What does the term “energy crisis” mean?
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3 years ago
If a car goes down Lake at 30 miles per hour how far will it go in 0.25 hours?
kati45 [8]

Answer:

7.5 miles

Explanation:

0.25 hours=15minutes.

So you do

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x =15minutes

cross multiply

Ans-7.5

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