Physics
Which of the following experiments analyzed the Fraunhofer lines of the solar spectrum?

Bunsen and Kirchhoff's experiment
Geiger and Marsdens experiment on scattering of alpha particles
Lamb-Rutherford experiment
Barkla's experiment on scattering of X-rays

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Physics
Which is evidence that supports the dynamo theory?

Earth's outer core contains liquid that conducts electricity
Granite and basalt conduct electricity
Convection occurs in Earth's inner core
Earth's core contains a large amount of iron

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