If the image formed by a concave mirror is closer to the mirror than the object is, then, compared to the object, the image will be
A. smaller and inverted.
B. larger and erect.
C. larger and real.
D. larger and inverted.
Answer: A
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Atomic Nucleus: All nuclei of a given element have the same number of
A. neutrons. B. protons. C. nucleons. D. protons + neutrons.
A boat is floating in a small pond. The boat then sinks resting on the bottom, but the pond is so shallow that part of the boat is not submerged. What happens to the level of the pond?
a. It increases. b. It decreases. c. It stays the same. d. In some cases it would decrease, in others it would stay the same. e. In some cases it would increase, in others it would stay the same.
What do we mean by the "geological record"?
A) rocks from earlier periods of the Earth's history B) samples of meteorites that fell to Earth early in its history C) remains of ancient organisms preserved in rocks D) an album by the Rolling Stones
A piano wire of length 1.5 m vibrates so that one-half wavelength is contained on the string. If the frequency of vibration is 65 Hz, the amplitude of vibration is 3.0 mm, and the density is 15 g/m, how much energy is transmitted per second down the wire?
A. 21 W B. 11 W C. 5.4 W D. 2.2 W E. 1.1 W