Consider an electromagnetic wave traveling in the positive y direction. The magnetic field associated with the wave at some location at some instant points in the negative x direction as shown in Figure OQ34.11. What is the direction of the electric field at this position and at this instant?
4
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Which is a characteristic Venus shares with Earth? a. Both planets have an ozone layer within their atmospheres
b. Both planets rotate clockwise on their axes. c. Both planets have a uniform circulation within their atmospheres. d. Both planets are still geologically active. e. Both planets have heavily cratered surfaces.
Quarks come in how many flavors?
A. 2 B. 3 C. 4 D. 5 E. 6
Which of the following is not a major idea of Einstein's general theory of relativity?
A) Time runs slower near strong gravitational fields. B) It is possible to travel through wormholes. C) Our universe can have no center or boundaries, yet be finite. D) Black holes can exist in spacetime, and falling into a black hole means leaving the observable universe.
Two parallel wires are separated by 0.36 m. Wire A carries 4.8 A and Wire B carries 8.9 A, both currents in the same direction. The force on 0.53 m of Wire A is:
a. 1.3E–5 N. b. 4.5E–5 N. c. 2.6E–6 N. d. 1.4E–6 N. e. 4.0E–5 N.