13_InstSolManual_PDF_Part1

13_InstSolManual_PDF_Part1 - FLUID MECHANICS 13 5. A 6. B...

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Unformatted text preview: FLUID MECHANICS 13 5. A 6. B 7. C 8. D 9. D 10. A 11. C 12. C 13. E 14. B 15. A Answers to Multiple-Choice Problems 1. B 2. A 3. A, D 4. C Solutions to Problems Solve: V 5 1 5.0 3 1023 m 2 1 15.0 3 1023 m 2 1 30.0 3 1023 m 2 5 2.25 3 1026 m3. r5 The metal is not pure gold. 0.0158 kg m 5 7.02 3 103 kg / m3. 5 V 2.25 3 1026 m3 13.1. Set Up: The density of gold is 19.3 3 103 kg / m3. 13.2. Set Up: The density of platinum is 21.4 3 103 kg / m3. Solve: r 5 40.0 kg m m 5 1.87 3 1023 m3. V 5 L 3 and L 5 0.123 m 5 12.3 cm. so V 5 5 r V 21.4 3 103 kg / m3 13.3. Set Up: The density of iron is 7.8 3 103 kg / m3. The volume of a cylinder of radius r and length L is pr 2L. Solve: V 5 pr 2L 5 p 1 1.425 3 1022 m 2 2 1 0.858 m 2 5 5.47 3 1024 m3. r 5 m / V, so The weight is w 5 mg 5 41.8 N. This is about 9 lb; you will not need a cart. m 5 rV 5 1 7.8 3 103 kg / m3 2 1 5.47 3 1024 m3 2 5 4.27 kg. Solve: V 5 1 11.5 gal 2 13.4. Set Up: r 5 m / V so m 5 rV. w 5 mg. 1 gal 5 3.788 L 5 3.788 3 1023 m3. m 5 rV 5 1 737 kg / m3 2 1 4.36 3 1022 m3 2 5 32.1 kg and w 5 mg 5 315 N 31.1035 g $1.00 3 106 5 7.29 3 104 g 5 1 2344 ounces 2 1 ounce $426.6 / ounce 7.29 3 104 g m 5 5 3.78 3 103 cm3 r 19.3 g / cm3 3.788 3 1023 m3 5 4.36 3 1022 m3 1 gal 1 2 13.5. Set Up: r 5 m / V. For a sphere, V 5 4 pr 3. 3 Solve: (a) The mass of the nugget is V5 1 2 r5 and its diameter is 2r 5 19.3 cm 12 3 1 3.78 3 103 cm3 2 1/3 3V 1/3 5S T 5 9.66 cm 4p 4p 13-1 ...
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