Where would you be if the Sun passes through your zenith on December 21st?
A) Equator
B) Tropic of Cancer
C) Tropic of Capricorn
D) Antarctic Circle
E) South Pole
C
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Because of Mercury's lower gravity, ejecta from a meteorite covers much of its surface
a. True b. False Indicate whether the statement is true or false
A heat engine receives 7 900 J of heat from its combustion process and loses 3 200 J through the exhaust and friction. What is its efficiency?
a. 59% b. 35% c. 21% d. 41% e. 77%
Graphical Analysis: If the position versus time graph of an object is a horizontal line, the object is
A. moving with constant non-zero speed. B. moving with constant non-zero acceleration. C. at rest. D. moving with increasing speed.
A circular coil (radius = 0.25 m) has 143 turns and is in a uniform magnetic field. If the orientation of the coil is varied through all possible positions, the maximum torque on the coil by magnetic forces is 0.29 N?m when the current in the coil is 2.7 mA. What is the magnitude of the magnetic field?
a. 5.47 T b. 0.304 T c. 3.83 T d. 137 T