The bulk modulus of water is
and the density is
The velocity of sound in water is
A. 1,450 m/s.
B. 2,150 m/s.
C. 2,490 m/s.
D. 2,750 m/s.
E. 3,100 m/s.
A. 1,450 m/s.
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When the surface of a metal is exposed to blue light, electrons are emitted. If the intensity of the blue light is increased, which of the following things will also increase?
A) the number of electrons ejected per second B) the maximum kinetic energy of the ejected electrons C) the time lag between the onset of the absorption of light and the ejection of electrons D) the work function of the metal E) all of the above
Two sets of rings around Jovian planets were found by Earth-based observers, while two others were first imaged by the Voyagers
Indicate whether the statement is true or false
A physics professor pushes against a stationary wall, "working" up a sweat. Is he doing any actual physical work on the wall?
A) No--it's a law of nature that physics profs never do any actual work. B) No, because the force by his hands against the wall is balanced by the force by the wall pushing back. C) Yes, because he is exerting a force against the wall during a period of time. D) No, because the wall is not moving. E) Yes, because his arm muscles are moving other muscles through a distance.
What is the Doppler effect, and how is it produced? Cite two examples
What will be an ideal response?