A megaparsec is equivalent to
a. 3.26 light-years.
b. 206,265 AU.
c. the age of our solar system.
d. a million parsecs.
e. the diameter of the Milky Way galaxy.
d
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Which of the following statements about electrochemistry is not true?
A) It is the study of how electrical energy and chemical reactions are related. B) It involves the use of a set of oxidation-reduction reactions to produce electrical current. C) It involves the use of electrical current to produce an oxidation-reduction reaction. D) It is the study of how electrons are transferred from one chemical compound to another. E) All of the above are true.
A material which has the ability to rotate the direction of polarization of linearly polarized light is said to be
A) circularly polarized. B) birefringent. C) optically active. D) dichroic. E) diffraction limited.
A clarinet behaves like a tube closed at one end. If its length is 1.0 m, and the velocity of sound is 344 m/s, what is its fundamental frequency (in Hz)?
a. 264 b. 140 c. 86 d. 440 e. 172
The figure shows the distance versus time graph of an object
The velocity of the moving object is a non-zero constant.
a.
True
b.
False