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Get Full Access to College Physics For Ap® Courses - 1 Edition - Chapter 17 - Problem 20
Get Full Access to College Physics For Ap® Courses - 1 Edition - Chapter 17 - Problem 20

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# (a) How much more intense is a sound that has a level 17.0 dB higher than another (b) If

ISBN: 9781938168932 372

## Solution for problem 20 Chapter 17

College Physics for AP® Courses | 1st Edition

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Problem 20

(a) How much more intense is a sound that has a level 17.0 dB higher than another? (b) If one sound has a level 23.0 dB less than another, what is the ratio of their intensities?

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NEWTON: THE MIND THAT FOUND THE FUTURE ● different laws had to apply on earth and in the heavens ● science begins from theories or hypotheses that you have to prove ● in newton’s time, the gravity was in the apple ● all forces (including gravity) are between two objects, acting equally on both ○ newton’s 3rd law ● the natural path of a speeding object is a straight line, constant speed ○ uniform motion ● newton’s 1st law ● according to Halley, the force of gravity varies inversely with the square of the distance ● newton’s law of universal gravitation = everything attracts everything else ○ force is directly proportional to the two masses ○ force is inversely proportional to the separation of their centers, squared ● the resulting path of a planet = an ellipse Newton’s Methods ● conduct experiments on your own if you can ● more theoretical work ● no need to explain why ● sufficient to describe how Newton’s Other Achievements ● calculus = needed for law of gravity ● reflecting telescope ● developed color theory ● had a theory on the nature of light, which was not correct ● Halley’s role in developing and publishing Newton’s laws… ○ talked Newton into redoing his lost calculations ○ helped with some of the math ○ paid for the whole process ● the moon, the earth, and the sun are falling but moving so fast sideways that they never hit ● How fast would an apple have to travel to orbit the eart

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