The Atlantic Ocean has existed for most of the time since Earth's crust cooled.
Answer the following statement true (T) or false (F)
False
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If two children sit on a seesaw and one is twice as heavy as the other, in order to achieve balance the lighter child must sit
A. half as far from the fulcrum B. twice as far from the fulcrum C. the same distance from the fulcrum D. four times as far from the fulcrum
Consider a uniform electric field of 50. N/C directed toward the East. If the voltage measured relative to ground at a given point in the field is 80. V, what is the voltage at a point 1.0 m directly East of the point?
A) 15. V B) 30. V C) 0.15 kV D) 30. kV E) impossible to calculate from the information given
What do we mean by inflation?
A) the rapid expansion of the universe, driven by white dwarf supernova, that we still observe today B) the expansion of universe starting with the instant after the Big Bang C) the sudden release of photons when particles and antiparticles annihilate each other D) a sudden expansion of the universe driven by the energy released when the strong and electroweak forces froze out from the GUT force E) the photons released when electrons and protons first combined, forming the Cosmic Microwave Background Radiation
At what point in time is the current produced by the generator at its maximum?c
A. when the plane of the loop is vertical, in the same plane as the two magnetic poles B. when the plane of the loop is at 45? with respect to the line joining the two magnetic poles C. when the plane of the loop is horizontal, in the plane perpendicular to the line joining the two magnetic poles