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xxMikexx [17]
4 years ago
8

Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals that scientists d

escribe as which of the following?
A. revolutionary
B. rotational
C. periodical
D. elliptical
Physics
1 answer:
galben [10]4 years ago
7 0
Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals that scientists describe as elliptical. It is one of Kepler's laws. The sun is the focus of all the planets. The correct answer is D.
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3 years ago
The work function for magnesium is 3.70 ev. what is its cutoff frequency?
alexandr402 [8]

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

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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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2 years ago
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5 0
3 years ago
If the velocity of a runner changes from -2 m/s to -4 m/s over a period of time, the
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It will be A. So since its 2 times more the kinetic energy. But then you have to square it 2^2 = 4

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