Physics
A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will

Increase
Decrease
First decrease and then increase
Remains the same

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Physics
Which is evidence that supports the dynamo theory?

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

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