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A cosmic ray travels 60 km through the earth’s atmosphere in 400 μs, as measured by experimenters on the ground. How long does the journey take according to the cosmic ray?
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A cosmic ray travels 60 km through the earth’s atmosphere in 400 μs, as measured by experimenters on the ground. How long does the journey take according to the cosmic ray?

User Adil Aslam Sachwani
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1 Answer

3 votes

Answer:

a

Step-by-step explanation:

User Lior Elrom
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