Physics
Which of the following is the second largest source of global energy?

Nuclear Energy
None of these
Fossil fuel
Renewable Energy

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Physics
The sensation of weightlessness in a spacecraft in an orbit is due to the

Acceleration in the orbit which is equal to the acceleration due to gravity outside
Fact that spacecraft in the orbit has no energy
Absence of gravity outside
Presence of gravity outside but not inside the spacecraft

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Physics
Which statement best describes an igneous intrusion?

Magma is injected into surrounding rock forming an igneous intrusive
Magma is exported to an open area and forms iron
Igneous intrusion for when ice crystals splash into lava
Magma explodes to the surface and forms a smooth outer layer of rock

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