Where is the most obvious example of a mountain chain built by continental collision in plate tectonics? Which plates are involved in this head-on collision?
What will be an ideal response?
The Himalaya Mountains are the result of the uplifting as the Indian subcontinent has rammed into Asia in the last 30 million years.
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A 2.5 cm-long horizontal wire segment has mass 0.15 g and carries a current sufficiently large that it levitates when the segment is in a region of B field upward with magnitude 1.5 T. The current is passed to the segment that is in the magnetic field by way of massless electrical leads. What is the magnitude of the current that the wire carries?
A. 39 mA B. 25 A C. 4.0 mA D. Not enough information is given.
Our Sun and the entire Solar System orbits the center of the Milky Way Galaxy. It is somewhat less than ___ from the center of the Milky Way.
a. 20,000 LY b. 30,000 LY c. 30,000 LY d. 40,000 LY e. None of the above.
When is thermal energy trapped in the dense center of a cloud?
A) when the gravity becomes so strong that photons cannot escape B) when excited molecules collide with other molecules before they can release a photon C) when the cloud becomes so hot and dense that nuclear fusion begins D) when magnetic fields trap the radiation E) when the cloud cools down so much that less light escapes than is produced by contraction
A common fuel impurity in fossil fuels is ______________
Fill in the blank(s) with correct word