What is the sign of these fields’ curl component at point P on each diagram in the direction facing us? (Hint: Draw a cross-sectional view of a small curl-meter centered on the point in question, and sketch the magnetic field vectors at the midpoint of each of the curl-meter’s four sides in the drawing’s plane. Don’t worry about how we might create such a magnetic field.)
A. The component of the curl in this direction is positive.
B. The component of the curl in this direction is negative.
C. The component of the curl in this direction is zero.
C. The component of the curl in this direction is zero.
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The interface between two crystals in a polycrystalline single phase solid is a(n) _____________boundary.
Fill in the blank(s) with the appropriate word(s).
The planet's orbital period is:
A) the time it takes it to rotate and have the same face toward us again. B) the time it takes to return to the same location in the sky, relative to the Sun. C) the time it takes for a satellite to orbit it. D) the time it takes for it to retrograde back to the same position as we pass it. E) the time its magnetic field takes to spin once.
A quantity that has only a magnitude but no direction associated with it is called a __________
Fill in the blank(s) with correct word
What is the quark structure of a proton?
a. uud b. udd c. uuu d. ddd e. the question does not make sense