An o-ring is a rubber ring that is used in machinery as a seal against substances like oil and air. Although it is one of the most commonly used seals, it is forever linked to a catastrophic failure. After the space shuttle Challenger exploded in 1986, investigators determined that the o-ring seal in one of the shuttle’s solid fuel rockets failed due to a loss of elasticity that resulted from the low temperature at launch time. How was this problem later demonstrated at a news conference? More… Discuss

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