BabyBoo
,
Sunday, 15th of August 2010 10:54:01 AM
The Golden Gate bridge in San Francisco has a main span of length 1.28
BabyBoo
km--one of the longest in the world. Imagine that a taut steel wire with
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this length and a cross-sectional area of 3.20 multiplied by 10-6 m2 is
Joined: Sunday, 16th of May 2010, 13:03:32
laid on the bridge deck with its ends attached to the towers of the
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bridge, on a summer day when the temperature of the wire is 27.0°C. Note:
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If applicable, Table 19.1 is available for use in solving this problem. />(a) When winter arrives, the towers stay the same distance apart and the
bridge deck keeps the same shape as its expansion joints open. When the
temperature drops to -10.0°C, what is the tension in the wire? Take Young
is modulus for steel to be 20.0 multiplied by 1010 N/m2.
? N
/>(b) Permanent deformation occurs if the stress in the steel exceeds its
elastic limit of 3.00 multiplied by 108 N/m2. At what temperature would
this happen?
?°C