In the context of plate tectonics, what is a subduction zone?
A) a place where two plates are slipping sideways against one another
B) a place where a seafloor plate is sliding under a continental plate
C) a place where two continental plates are colliding
D) a place where two plates are pulling apart
B
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The Mississippi River has a huge delta. With each year and each episode of deposition, the river
A) lengthens its course and the delta shrinks. B) becomes choked and shortens as the delta grows. C) course lengthens and the delta grows. D) shortens as the delta moves upriver.
Iron is a poor choice of nuclear fuel because it releases
A) energy only when fused. B) energy only when fissioned. C) no energy when fused or fissioned.
A parallel-plate capacitor has a capacitance of 10 mF and is charged with a 20-V power supply. The power supply is then removed and a dielectric material of dielectric constant 4.0 is used to fill the space between the plates
What is the voltage now across the capacitor? A) 80 V B) 20 V C) 10 V D) 5.0 V E) 2.5 V
the event in the life of a star that begins its expansion into a giant is?
What will be an ideal response?