Aluminum: 2.75 g cm 3 (table value is 2% smaller) Copper: 9.36 g cm 3 (table value is 5% smaller) Brass: 8.91 g cm 3 Tin: 7.68 g cm 3 Iron: 7.88 g cm 3 (table value is 0. Free essays, homework help, flashcards, research papers, book reports, term papers, history, science, politics. (b) A cylinder = πR 2, A rectangular solid = lw 64. time required ≅ 50 years or more advise against accepting the offer 48. TheSound Intensity and the DeciBel Scale describes the relationship between the intensity of a sound at a given distance from the source and the associated deciBel level. Use the following table to help you answer the questions. (a) 3.16 × 10 7 s/yr (b) 6.05 × 10 10 yr 32. Each increase of 20 decibels (dB) for a sound will be about twice as loud to your ears. Remember negative doesnt mean the sound is. On a lot of digital sound systems for TVs and such, its often a decibel scale relative to the maximum that the speakers go, so a normal listening volume might be like -40 or whatever. On the normal decibel scale humans cant hear negative values. (a) 1.609 km/h (b) 88.5 km/h (c) 16.1 km/h 30. No, this has to do with intensity but not frequency. On the decibel scale, a level increase of 10 means that a sound is actually 10 times more intense, or powerful. The higher the decibel level, the louder the noise. It is also widely used in electronics, signals, and communication. Name: Date: 20A Decibel Scale Read: The loudness of sound is measured in decibels (dB). There are no questions to answer in Part 1.Setting up the pendulum There are no questions to answer in Part 2. (a) 6.31 × 10 4 AU (b) 1.33 × 10 11 AU 28. A decibel is a logarithmic unit used to measure sound level. The next step in the process is to test your hypothesis by creating experiments that can. Thus, (1.9) On this scale, proposed by Townsend (1954), the reference pressure is P0 1 mm Hg, which he considers to be the distinct border between high and low vacuum. This answer iscalled your hypothesis. On the decibel scale, a unit of pressure is equal to 10 times the negative value of the logarithm of the ratio of the actual pressure to a reference pressure. The process starts with a question and your answer to the question based on experience and knowledge. (a) 3.39 × 10 5 ft 3 (b) 2.54 × 10 4 lb 22. The scientific method is a process that helps you find answers to your questions about the world.
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