ACT Orange Science ACT Orange Science 538 Lesson 2: Charts and Graphs Lesson 2 Chatts and Graphs 539 Passage 2 from a source. sound travels in all directions in a pattern similar to a sphere. The intensity of a bound Based on the information provided in Figure 1, one can tell that as a person gets closer to the source of a sound. the intensity of the sound experienced by the person: dependent on the power produced by the source and the size of the splice at a certain distance tiny table I below shows several example sounds. their sound levels. and their intensities all examples A increases from a distance of I meter unless otherwise noted. Figure I below shows the relationship between de relative intensity of a sound and the distance, in meters. the listener is from the source of that want remains constant. 2) fluctuates Table 1 Sound Intensity Based on the information in the passage, one can tell that the intensity experienced when I meter Example away from a motorcycle is approximately: Level (dB) (w/mz) Threshold of 8 A) 1 x 10 2 W/m , 1 x 10-12 human hearing B) 1 x 10 W/m. 1 x 10-11 Rustling leaves () 1 x 10 # W/m. 10 D) 1 x 103 W/m 20 1 x 10-10 Whisper 5 Which of the following objects best describes the source of the sound provided in Figure !? 1 x 10- Quiet rural A) Something barely audible to the human car 30 area Relative Sound Intensity (W/m') B) Rustling leaves 40 1 x 10-8 Bird call C) A chain saw 3 D) An aircraft carrier deck 50 1 x 10~ Normal conversation 2 60 1 x 10-6 Background 4 A sound from a distance of 1 meter away has an intensity of 5 x 10 ' W/m'. What is the music approximate sound level, in dB, of the sound? () 65 70 1 x 10-s Vacuum O cleaner B) 75 80 1 x 10-4 Garbage 0 0.5 1 1.5 2 2.5 3 3.5 4 2 C) 85 disposal Distance from Source (meters) D) 400 90 1 x 10-3 Motorcycle (at 10 m Figure 1 S. Based on the information presented above, would what be the intensity, in W/m , from 1 meter 100 1 x 10-2 Garbage Truck away, of a sound that measures 27 dB? A) Between 1 x 10- and 1 x 10-10 110 1 x 10-1 Live rock music B) Between 1 x 10- and 1 x 10" C) Between 1 x 10- and 1 x 10-# 120 1 x 10 Chainsaw D) Between 1 * 10 and 1 x 10-7 140 1 x 102 Aircraft carrier deck 6. Based on information in the passage, you can determine that moving from a distance of 0.5 160 So loud that meters away from a sound source to a distance of 1.0 meters away from the source does which of 1 x 104 eardrums burst the following to relative sound intensity? A) Increases the relative sound intensity by a factor of 4 B) Increases the relative sound intensity by a factor of 2 ") Decreases the relative sound intensity by a factor of 2 D) Decreases the relative sound intensity by a factor of 4 education Ves Version 3.0 be smarter. Unauthorized copying or reuse of any part of this page is alegal Amouthereand coping or reuse of any part of this page is magal. C2 education be smarter