A sewing machine needle moves with a rapid vibratory motion
A sewing machine needle moves with a rapid vibratory motion, rather like SHM, as it sews a seam. Suppose the needle moves 7.8 mm from its highest to its lowest position and it makes 26 stitches in 8.7 s. What is the maximum needle speed?
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a reaction has a rate constant of 121times10-4 at 25 degrees c and 0232 at 79 degrees c the activation barrier for the
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a sewing machine needle moves with a rapid vibratory motion rather like shm as it sews a seam suppose the needle moves
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question 1the recent events in syria iraq and the fear that the unrest will spread to other middle eastern oil
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