Electrical resistance shares some conceptual parallels with the notion of mechanical friction.
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The rear engine was started first by mechanical friction clutch.
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Subjects on this non-motorized treadmill were required to walk and run at a positive percentage grade to overcome mechanical friction.
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The pulsing is in turn causing bearings in the motor assemblies to bunch, creating internal mechanical friction, the analysts believe.
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The rear engine was started first by compressed air, then the front engine was started through a mechanical friction clutch.
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Some sleds have been known to borrow mechanical friction from chassis movement to heat the blades, making for a faster ride.
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Thirdly, the nonideal behavior of real engines, such as mechanical friction and losses in the combustion process causes further efficiency losses.
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The repulsive force, which harnesses a quantum phenomenon known as the Casimir effect, may someday allow nanoscale machines to overcome mechanical friction.
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For an electrically resonant system, the " Q " factor represents the effect of electrical resistance and, for electromechanical resonators such as quartz crystals, mechanical friction.
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"This way, you're getting cleaning action from mechanical friction and you're also getting cleaning from a vacuum, suction-type action through the center of the rod, " he said.
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