Thin Lenses: The image formed by a single concave lens
A. is always real.
B. is always virtual.
C. could be real or virtual, depending on whether the object distance is smaller or greater than the focal length.
D. could be real or virtual, but is always real when the object is placed at the focal point.
E. is always inverted.
Answer: B
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When two tectonic plates collide:
A) they both stop moving. B) they always produce high mountain chains like the Himalayas. C) volcanoes always mark the boundary between them. D) they continue moving, producing a variety of large deformations. E) that region is safe from earthquakes now the plates are fixed.
Identical 2.0-?C charges are located on the vertices of a square with sides that are 2.0 m in length. Determine the electric potential (relative to zero at infinity) at the center of the square.
A. 38 kV B. 51 kV C. 76 kV D. 64 kV E. 13 kV
What similarity did Isaac Newton perceive between a falling apple and the moon?
A) The velocities of both are directed toward Earth's center. B) Both have a velocities and accelerations directed toward Earth's center. C) Both have accelerations directed toward Earth's center, although the forces on them are in different directions. D) Both have forces on them toward Earth's center, and accelerations directed toward Earth's center. E) Both have forces on them toward Earth's center, but their accelerations are in different directions.
Explain how giant molecular clouds give rise to spiral tracers as they move through a disk with spiral density waves
What will be an ideal response?