1. Identify
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2. This is a preliminary sketch by the founder while envisioning his idea. What did it result in?
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3. The picture below shows the collapse of the newly built Tacoma Narrows Suspension bridge in 1940. When subjected to 64 km/h winds, it twisted and vibrated violently in a manner never seen before. The instability in winds inspired the nickname Galloping Gertie. The bridge's collapse has had a lasting effect on science and engineering. The reason for its failure is generally attributed to a phenomenon where aerodynamic forces on an object couple with a structure's natural mode of vibration to produce rapid periodic motion. Name the phenomenon.
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4. What product is being advertised in the print advertisements?