Means it'll stretch easy but take a lot of force to snap.
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You can't just change the aspect ratio of your tv. The original
aspect ratio will always be the same for your TV. However, you can
choose to stretch the image to fit your TV screen, but it will
become distorted.
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They can't be designed not to. Large cables and ropes are extremely different to stretch straight, because of their high weight-to-length ratio.