The transmission of power from one place to another is evident in
A) household electricity.
B) radio broadcast.
C) mobile phones.
D) all of the above
Answer: D
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Briefly explain how we can use spectral lines to determine an object's radial motion. Can we also learn the object's tangential motion (across our line of sight) from its spectral lines?
What will be an ideal response?
Light strikes a diamond (n = 2.42) immersed in glycerin (n = 1.473) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
A. 20° B. 60° C. 32° D. 64° E. 15°
A temperature change of 20 C° corresponds to a temperature change of
A) 68. F°. B) 11.1 F°. C) 36. F°. D) 42. F°. E) 20. F°.
What elements do the symbols Fe, Na, Au, and Hg stand for?
a. aluminum, nitrogen, silver, tungsten b. iron, sulfur, silver, ytterbium c. iron, sodium, silver, mercury d. iron, sodium, gold, mercury e. none of the above