What is helpful about UV rays?

2 answers:

8 0

UV rays can be found In the sun and in tanning beds.
UV rays can cause cancer (skin) if proper skin health is not happening (sunscreen)

I hope this helps you!

nignag [31]3 years ago

8 0

UV rays (sunlight) are used in plants during photosynthesis, and helps generate oxygen for us using carbon dioxide that we produce

Humans:
intake: oxygen
'waste': carbon dioxide

Plants:
intake: carbon dioxide
'waste": oxygen

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gulaghasi [49]

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forsale [732]

Answer:

10.8 days (3 sig.figs.)

Explanation:

All radioactive decay is 1st order decay defined by the expression A = A₀e^-kt

which is solved for time of decay (t) => t = ln(A/A₀) / -k

A = final weight = 1.0 gram

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3 years ago

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SVEN [57.7K]

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3 years ago

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