Suppose a uniform electric field of 4 N/C is in the positive x direction. When a charge is placed at and fixed to the origin, the resulting electric field on the x axis at x = 2 m becomes zero. What is the magnitude of the electric field at x = 4 m on the x axis at this time?
a. 0
b. 1 N/C
c. 2 N/C
d. 4 N/C
e. More information is needed to find the resulting field magnitude at this position.
c
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An airplane overhead exceeds the sound barrier and produces a conical wave front. If the air through which the plane flew had been significantly warmer and the plane were traveling at the same speed, how would the angle of the conical wave front been different?
1.The angle would have been greater. 2.The angle would have been less. 3.The angle would have been the same. 4.The change in the angle cannot be determined from the information given.
Which of the following optical elements used alone can produce a real image of an object?
A. Negative lens B. Plane mirror C. Convex mirror D. Concave mirror E. Prism
As the principal quantum number for a particle in the infinite square well increases, what happens to the spacing between adjacent energy levels?
A. It decreases B. It stays the same C. It increases
Uranus's large axis tilt causes it to
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