16. A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the received sound thus becomes A. nine times as high. B. three times as low. C. nine times as low. D. three times as high.
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User: 16. A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the received sound thus becomes A. nine times as high. B. three times as low. C. nine times as low. D. three times as high.

Weegy: ... surface receiving sound is moved from its original position to a position three times farther away from the source of the sound The intensity of [ the received sound thus becomes low or high? ... original position three times farther away ... ]

User: 17. If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have A. a frequency higher than the original frequency. B. a pitch lower than the original pitch. C. a period higher than the original period. D. an amplitude lower than the original amplitude.

Weegy: The answer is: A. a frequency higher than the original frequency.
sharpies|Points 8737|

User: 18. Which of the following phenomena is taking place when sound waves are reflected from a surface along parallel lines? A. Refracting B. Diffusion C. Focusing D. Absorption

Weegy: D. Refracting is taking place when sound waves are reflected from a surface along parallel lines.
andrewpallarca|Points 18402|

User: 19. A wave with a period of 0.008 second has a frequency of A. 80 Hz. B. 125 Hz. C. 800 Hz. D. 12.5 Hz.

Weegy: A. 125 Hz. A disturbance that propagates through space is called a wave. [ Periodic waves are characterised by crests(highs) and troughs(lows). The Time Period of a wave is the time taken for a wave to complete one cycle and come back to the position from where it started(0 or 2pi radians). The Frequency is how many cycles the wave completes in unit time(one second) called Hertz(Hz). Now if one cycle takes = 0.008 sec in one sec no of cycles = (1 sec / 0.008 sec) = 125 cycles/sec = 125 Hz ]
latefisher|Points 3420|

User: 20. The _______ of a sound wave is defined as the amount of energy passing through a unit area of the wave front in a unit of time. A. compression B. frequency C. intensity D. amplitude

Weegy: The C)intensity of a sound wave is defined as the amount of energy passing through a unit area of the wave front in a unit of time.

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23. Within the metric system all units are based on the number A. 100. B. 1000. C. 10. D. 1.
Weegy: The hexadecimal system (base 16) uses the letters A, B, C, D, ... the octal number 2154 = 10 001 101 100. ... converting within the metric system ... [ ] User: 24. The orbits of planets being elliptical was one the planetary laws developed by A. Ptolemy. B. Kepler. C. Copernicus. D. Brahe. Weegy: The answer is B. [ Kepler In astronomy, Kepler's laws of planetary motion are three scientific laws describing orbital motion, each giving a description of the motion of planets around the Sun. ] User: 24. The orbits of planets being elliptical was one the planetary laws developed by A. Ptolemy. B. Kepler. C. Copernicus. D. Brahe. Weegy: The answer is B. [ Kepler In astronomy, Kepler's laws of planetary motion are three scientific laws describing orbital motion, each giving a description of the motion of planets around the Sun. Weegy: The orbits of planets being elliptical was one the planetary laws developed by B)Johannes Kepler.Kepler first Law of Orbits: All planets move in elliptical orbits, with the sun at one focus. (More)
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