Calculate the pressure amplitude (in N/m2) of a 500 Hz sound wave in helium if the displacement amplitude is equal to 5.0 × 10^?8 m. (? = 0.179 kg/m3, v = 972 m/s.)
a. 3.5 × 10^?2
b. 1.6 × 10^?2
c. 2.7 × 10^?2
d. 4.2 × 10^?2
e. 2.0 × 10^?2
c
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The diagram below illustrates the layout and light path of a reflecting telescope of the ____________________ design
Fill in the blank(s) with correct word
Magnetic Field of a Current Loop: A single current-carrying circular loop of radius R is placed next to a long, straight wire, as shown in the figure. The current I in the wire flows to the right. In which direction must current flow in the loop to produce a net magnetic field of zero at its center?
A. counterclockwise B. clockwise C. It could be either clockwise or counterclockwise. D. The current in the loop should be zero.
Weather always occurs in the lowest layer of the atmosphere, the
A) mesosphere. B) thermosphere. C) ionosphere. D) stratosphere. E) troposphere.
If the position versus time graph of an object is a vertical line, the object is
A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. E) none of the above