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cluponka [151]
3 years ago
7

13 This word describes the circulatory system that provides nutrients and oxygen to living cells of the body.

Chemistry
1 answer:
Nina [5.8K]3 years ago
4 0

Answer: Cardiovascular System

Explanation:

This involves your heart, blood, veins, and arteries

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What is the approximate energy of a photon having a frequency of 4 x 10^7 Hz? (h = 6.6 x 10^-34 J . s)
BigorU [14]

Answer:

2.64 ×10^{-26} J

Explanation:

I think you should mark it a physics question instead but anyway.

---------------------------------------------------------------------------

The Planck equation should be applied:

E = hv , while E is energy of proton; h is Planck constant; and v is frequency.

E = 6.6 × 10^{-34} × 4 × 10^{7}

  = 6.6 × 4 × 10^{-27}

  = 2.64 ×10^{-26} J

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3 years ago
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Answer:

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c

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