Two massive objects are fixed in position. A third object is placed directly between the first two at the position at which the total gravitational force on the third object due to the two massive objects is zero.
The object is displaced slightly toward one of the two massive objects, the total gravitational force on the third object is now A)
zero.
B)
in a direction which depends on which of the massive objects has a greater mass.
C)
in the same direction the object is displaced.
D)
in the opposite direction to the displacement of the object.
E)
perpendicular to the displacement of the object.
Question 2
What is the energy density in the magnetic field 25 cm from a long straight wire carrying a current of 12 A?
A)
7.3 10-5 J/ m3
B)
3.7 10-5 J/ m3
C)
3.6 10-4 J/ m3
D)
1.2 10-4 J/ m3
E)
cannot be determined with the information given
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