At a point in space where the magnetic field is measured, the magnetic field produced by a current element
a. points radially away in the direction from the current element to the point in space.
b. points radially in the direction from the point in space towards the current element.
c. points in a direction parallel to the current element.
d. points in a direction parallel to but opposite in direction to the current element.
e. points in a direction that is perpendicular to the current element and perpendicular to the radial direction.
e
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A star has a parallax of .05". Its distance is
A) 20 parsecs. B) 200 parsecs. C) 66 parsecs. D) 5 light-years. E) 660 light-years.
Spherical Mirrors: If you stand in front of a convex mirror, at the same distance from it as its radius of curvature,
A. you won't see your image because there is none. B. you won't see your image because it is focused at infinity. C. you will see your image and you will appear smaller than you. D. you will see your image and you will appear larger than you. E. you will see your image and it will be the same size as you except upside down.
Nucleons are
A) hadrons. B) baryons. C) leptons.
Deltas form as
A) periodic flooding clogs stream channels. B) erosion clogs stream channels. C) stream gradient decreases. D) streams enter a standing body of water.