Spherical Mirrors: A concave mirror having a focal length of magnitude 5.0 cm forms an image 4.0 cm behind the mirror. Where is the object for this image?
A. 2.2 cm in front of the mirror
B. 2.2 cm behind the mirror
C. 9.0 cm in front of the mirror
D. 1.0 cm behind the mirror
E. 20 cm behind the mirror
Answer: A
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When five equal positive charges are uniformly spaced along the x-axis, the force on the next to last charge on the right is directed
A) to the right. B) possibly in the negative y-direction. C) zero. D) possibly in the positive y-direction. E) to the left.
All events and all things exist in "the spacetime continuum" with coordinates
A) of distances in three dimensions. B) of time. C) both of these D) none of these
Index of Refraction: If the index of refraction of a material is 2, this means that light travels
A. 2 times as fast in air as it does in vacuum. B. 2 times as fast in the material as it does in air. C. 2 times as fast in vacuum as it does in the material. D. 2 times as fast in the material than it does in vacuum. E. 1/2 as fast in air as it does in the material.
The slope of a position versus time graph gives
A) the distance traveled. B) velocity. C) acceleration. D) displacement.