Answers about Physics
A longitudinal wave is a wave of which the disturbance direction is the same direction of the direction of the wave. Waves done in a spring and sound waves are
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Physics
Why the metal strip should be flat or 카지노사이트 wire be kink free in screw gauge?
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if the strip will flat we can measure its thickness easily but if it is not flat i.e. its surface is irregular then it will thick only from some points and its
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Physics
How often must food contact surfaces that do not come into contact with PHF foods be cleaned?
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24
hours