Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 4, Problem 25QAP
To determine
The reason why it is difficult to build the refractor having aperture twice the largest refractor.
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Aromatic molecules like those in perfume have a diffusion coefficient in air of approximately 2×10−5m2/s2×10−5m2/s.
Part A
Estimate, to one significant figure, how many hours it takes perfume to diffuse 2.5 mm, about 6.5 ftft, in still air.
Express your answer in hours to one significant figure.
Rocket Science:
CH
83. A rocket of mass M moving at speed v ejects an infinitesimal
mass dm out its exhaust nozzle at speed vex. (a) Show that con-
servation of momentum implies that M dy = vex dm, where dy is
the change in the rocket's speed. (b) Integrate this equation from
some initial speed v; and mass M; to a final speed vf and mass Mf
Vf
to show that the rocket's final velocity is given by the expression
V₁ = V¡ + Vex ln(M¡/M₁).
Formant Freqmcy
The horizontal dotted lines represent the formants. The first box
represents the schwa sound. The second box is a different vowel.
The scale is the same on each of these two vowels. Use the two
formant contours to answer questions 12-16
SCHWA
VOWEL 2
0.179362213
Time (s)
0.92125285
0.0299637119
4000
1079
Time(s)
unknown
0.6843
13. Please describe what the tongue is doing to shift from the
schwa to vowel 2?
14. Is vowel 2 a rounded or unrounded vowel?
15. Is vowel 2 a front or back vowel?
16. What vowel is vowel 2 (00, ee, ah)
0684285714
Chapter 4 Solutions
Understanding Our Universe
Ch. 4.1 - Prob. 4.1CYUCh. 4.2 - Prob. 4.2CYUCh. 4.3 - Prob. 4.3CYUCh. 4 - Prob. 1QAPCh. 4 - Prob. 2QAPCh. 4 - Prob. 3QAPCh. 4 - Prob. 4QAPCh. 4 - Prob. 5QAPCh. 4 - Prob. 6QAPCh. 4 - Prob. 7QAP
Ch. 4 - Prob. 8QAPCh. 4 - Prob. 9QAPCh. 4 - Prob. 10QAPCh. 4 - Prob. 11QAPCh. 4 - Prob. 12QAPCh. 4 - Prob. 13QAPCh. 4 - Prob. 14QAPCh. 4 - Prob. 15QAPCh. 4 - Prob. 16QAPCh. 4 - Prob. 17QAPCh. 4 - Prob. 18QAPCh. 4 - Prob. 19QAPCh. 4 - Prob. 20QAPCh. 4 - Prob. 21QAPCh. 4 - Prob. 22QAPCh. 4 - Prob. 23QAPCh. 4 - Prob. 24QAPCh. 4 - Prob. 25QAPCh. 4 - Prob. 26QAPCh. 4 - Prob. 27QAPCh. 4 - Prob. 28QAPCh. 4 - Prob. 29QAPCh. 4 - Prob. 30QAPCh. 4 - Prob. 31QAPCh. 4 - Prob. 32QAPCh. 4 - Prob. 33QAPCh. 4 - Prob. 34QAPCh. 4 - Prob. 35QAPCh. 4 - Prob. 36QAPCh. 4 - Prob. 37QAPCh. 4 - Prob. 38QAPCh. 4 - Prob. 39QAPCh. 4 - Prob. 40QAPCh. 4 - Prob. 41QAPCh. 4 - Prob. 42QAPCh. 4 - Prob. 43QAPCh. 4 - Prob. 44QAPCh. 4 - Prob. 45QAP
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