Diagram 3-1 shows three approximate locations of the setting Sun along the western horizon. Which number indicates the location of the Sun at sunset on December 21 (winter Sun) for an observer at a latitude of 48° north of the equator? Choose the best answer
a. 1
b. 2
c. 3
d. The Sun will set in the east for an observer in the southern hemisphere.
e. The Sun will not set on December 21 at this latitude.
A
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A proton is maintained at rest in the middle of a box that has no matter inside it other than the single proton
Assuming that the box is isolated from all external influences, which of the following would we expect to find at some other point X inside the box? A) an electric field B) a magnetic field C) Both of the above. D) an electric force E) All of the above.
Two solenoids are each made of 2 000 turns of copper wire per meter. Solenoid I is 2 m long, while solenoid II is 1 m long. When equal currents are present in the two solenoids, the ratio of the magnetic field BI along the axis of solenoid I to the magnetic field BII along the axis of solenoid II, BI/BII, is
a. 1/4. b. 1/2. c. 1. d. 2 e. 4.
After you drop the box and it has fallen half way, its potential energy is __________ and its kinetic energy is __________
Fill in the blank(s) with correct word
An electron is moving at
m/s at an angle of 40
to a 0.80 T magnetic field. What is the magnitude of the acceleration of the electron?
A. 
B. 
C. 
D. 
E. 