DEVICES

Ever wondered how that thing works? Explore the inner workings of many common devices and inventions, as well as those that aren't so common, such as compasses, gyroscopes and bug zappers.
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How strong are the magnets in an MRI machine?

A friend of mine told me that his watch flew off his arm and was sucked into the MRI machine at the hospital. Could this really happen? How strong are the magnets in an MRI machine?

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