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img140 - 22.‘ How large a force is necessary to stretch a...

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Unformatted text preview: 22.‘ How large a force is necessary to stretch a 2.0—mm—diameter steel wire (Y = 2.0 x 1011 N/mz) by 1.0% ? (1) 6.3 x 103 N (2) 3.1 x 103 N (3) 9.4 x 103 N (4) 1.3 x 104 N (5) 4.2 x 104 N 23. Water ﬂows at 10 m/s through a. pipe with radius 0.030 m. The pipe goes up to the second ﬂoor of the building, 2.0 Inf higher, and the pressure’remains unchanged. What is the radius of the pipe on the second ﬂoor? (1) 0.033 m (2) 0.046 m (3) 0.025 m1 (4) 0.012 m (5) 0.009 m 24. How deep under the surface of a lake would the pressure be double that at the surface? (1 atm = 1.01 x 105 Pa) (1) 10.3 m (2) 1.00 m (3) 9.80 m (4) 32.2 m (5) 4.68 m 146 ,«u‘ _ ...
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