A power stroke is, in general, the stroke of a cyclic motor which generates force. It is used in describing mechanical engines and molecular motors such as ATP synthase. Many types of motors can be simply describes by first, intake stroke(intake of fuel, e.g. gasoline, ATP, etc.) then power stroke and last exhaust stroke(exhaustion of what's left of the fuel which is now in a low energy state), possibly with some steps inbetween such as the compression stroke in four-stroke cycle engines and then repeating the cycle.
In muscles, the power stroke is the stage of muscle contraction when the cross-bridge (connecting the actin in the thin filament to the myosin in the thick filament) moves towards the H-zone, thus causing the muscle fiber to contract. The energy for this process comes from ATP present in the myosin prior to contraction.
In sports, too, often a swing with a lot of force will be called a power stroke. For example, this is used in canoeing to describe a powerful motion with a paddle.
Ignition of fuel, powerstroke, and exhaust stroke.
The power output of the engine is dependent on the ability of the engine to allow large volume flow of both air-fuel mixture and exhaust gas through the respective valve ports, typically located in the cylinder head.
Rod/stroke ratio is the ratio of the length of the connecting rod to the length of the crankshaft's stroke.
If, after a stroke, the person is not competent, an attorney may be retained to file a formal complaint and other legal pleadings in the Superior Court to permit the trusted family member, friend, or professional to handle financial affairs.
A Power of Attorney is a written document in which a competent adult individual (the "principal") appoints another competent adult individual (the "attorney-in-fact") to act on the principal's behalf.
Powers of Attorney are generally given by one person to another so that if the granter of the power becomes ill or incapacitated, the Power of Attorney will permit the holder to pay the grantor's bills and to handle the grantor's affairs during the inability of the grantor to do the same.
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