The wavelength of ultrasound at 1 million Hz in air where the speed of sound is 340 m/s is __________
Fill in the blank(s) with correct word
0.00034 m
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The law of conservation of strangeness tells us that strangeness is not conserved for which of the following interactions?
a. strong b. electromagnetic c. weak d. All three of the above interactions conserve strangeness.
An ideal parallel-plate capacitor consists of two parallel plates of area A separated by a distance d. This capacitor is connected to a battery and charged until its plates carry charges +Q and -Q, and the battery is then disconnected
If the separation between the plates is now doubled, the electrical energy stored in the capacitor will A) double. B) quadruple. C) be cut in half. D) be cut in fourth. E) not change.
Strictly speaking, if any electrical device in an automobile is turned on (such as an air conditioner or even headlights), more fuel is consumed by the engine. This statement is
A) true. B) true only if the engine is running. C) always false. D) sometimes true, sometimes false.
Two waves are described by y1 = 6 cos(180t) and y2 = 6 cos(186t) (both in meters). What effective frequency does the resultant vibration have at a point?
a. 92 Hz b. 183 Hz c. 6 Hz d. 3 Hz e. 366 Hz