At a certain instant in time, the electric field of an electromagnetic wave in free space points in the -z direction, and the magnetic field points in the +y direction. In what direction is this wave traveling?
A) +x direction
B) -x direction
C) +y direction
D) -z direction
E) +z direction
A
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The uncertainty principle was derived by whom?
a. Schrödinger b. Heisenberg c. de Broglie d. Compton
The evolution of a star is controlled mostly by its
What will be an ideal response?
The force between two unlike magnetic poles
A. increases as the separation distance between them increases in a linear fashion B. increases as the separation distance increases, but proportional to the square of the distance C. decreases as the separation distance between them increases, in a linear fashion D. decreases as the separation distance between them increases, but in proportion to the square of the distance.
A small object is enclosed in plastic (n = 1.5). The object appears to be 4.0 cm below the surface. What is the actual distance of the object below the surface?
B. 2.7 cm C. 4.0 cm D. 5.5 cm E. 6.0 cm