Which previously unknown planet's location was predicted from mathematical calculations of orbital motions?
A) Mercury
B) Uranus
C) Neptune
D) Pluto
E) all of the above
C
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Two insulated current-carrying straight wires of equal length are arranged in the lab so that Wire A carries a current northward and Wire B carries a current eastward, the wires crossing at their midpoints separated only by their insulation. Which of the following statements are true?
a. The net force on Wire B is southward. b. The net force on Wire A is westward. c. There are no forces in this situation. d. There are forces, but the net force on each wire is zero.
The three types of plate boundaries are convergent, __________, and transform boundaries
a. divergent b. slip c. strike d. none of these
An east-facing loop carries a counterclockwise current as viewed from the east. Suppose we place this loop in a uniform magnetic field pointing vertically upward. The loop is free to rotate around any axis. How will the loop respond to the magnetic field?
A. When viewed from above, the loop will twist 90° clockwise to face south. B. When viewed from above, the loop will twist 90° counterclockwise to face north. C. When viewed from the south, the loop will twist 90° clockwise to face downward. D. When viewed from the south, the loop will twist 90° counterclockwise to face upward. E. The loop is not affected by the field.
Newton's rings:
a. are a sound that light can cause. b. require oil to occur. c. are a result of Fraunhofer diffraction. d. are an interference phenomenon.