While the Tacoma Narrows Bridge solved a problem, it did not do so for long. The bridge was not durable and could have caused harm to people on or near the bridge at the time it collapsed.
The first Tacoma Narrows Bridge in Washington crossed over a strait in Puget Sound. It was opened in July 1940. The bridge collapsed in November 1940.
The bridge collapsed due to an aero-elastic flutter caused by strong winds. The bridge started oscillating at great speed and eventually fell. The bridge collapse had lasting effects on science and engineering.
While the Tacoma Narrows Bridge solved a problem, it did not do so for long. The bridge was not durable and could have caused harm to people on or near the bridge at the time it collapsed.
They lie flat when we are warm, and rise when we are cold. The hairs trap a layer of air above the skin, which helps to insulate the skin against heat loss. For example, if we become too cold, the hair erector muscles contract.
Since it's a recessive disorder that means the presence of the dominant allele will overshadow the recessive if it's present. Two recessive alleles have to be present in order for the person to have the disorder.
