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MAVERICK [17]
3 years ago
6

Explain why each element has a unique spectrum of absorption or emission lines.

Physics
1 answer:
Naya [18.7K]3 years ago
6 0
Each elements emission spectrum is distinct because each element has a different set of electron energy levels. The emission lines correspond to the differences between various pairs of the many energy levels. The lines (photons) are emitted as electrons fall from higher energy orbitals to lower energies.
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Q11) If you were standing at the top of a building and you dropped a rock.
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Answer:

Part A

The distance travel by the rock is approximately 132.496 m

Part B

The speed when the rock hits the ground is approximately 50.96 m/s

Explanation:

Part A

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The given parameter is the time it takes the rock to hit the ground, t = 5.2 s

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h = 1/2·g·t²

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h = The height from which the object is dropped

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t = The time taken to travel the distance, h = 5.2 s

∴ h = 1/2 × 9.8 m/s² × (5.2 s)² ≈ 132.496 m

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Part B

The speed, 'v', when the rock hits the ground, is given by the following kinematic equation,

v = g·t

∴ v = 9.8 m/s² × 5.2 s = 50.96 m/s

The speed when the rock hits the ground, v ≈ 50.96 m/s.

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