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viktelen [127]
3 years ago
11

Explain how an intrusive igneous rock could become a metamorphic rock and then an extrusive igneous rock.

Physics
1 answer:
sleet_krkn [62]3 years ago
5 0
1.igneous rocks are formed when magma or lava cools and hardens
2. the cooling rate of the rock
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The work function for magnesium is 3.70 ev. what is its cutoff frequency?
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The cutoff frequency for magnesium is 8.93 x 10¹⁴ Hz.

<h3>What is cutoff frequency?</h3>

The work function is related to the frequency as

W0 = h x fo

where, fo = cutoff frequency and h is the Planck's constant

Given is the work function for magnesium is  3.70 eV.

fo = 3.7 x 1.6 x 10⁻¹⁹ / 6.626 x 10⁻³⁴

fo = 8.93 x 10¹⁴ Hz.

Thus, the cut off frequency is 8.93 x 10¹⁴ Hz.

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