Physics
A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:

50 J
75 J
100 J
150 J

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Physics
In a conductor

There is no conduction band
The forbidden energy gap is very narrow
The forbidden energy gap is very wide
The valence band and the conduction band overlap each other

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Physics
Which statement best describes an igneous intrusion?

Magma is exported to an open area and forms iron
Magma is injected into surrounding rock forming an igneous intrusive
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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