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A particle is in simple harmonic motion with period T. At time t=0 it is halfway between the equilibrium point and an end point of its motion, travelling toward the end point. The next time it is at the same place is:
Demand Instrument
A financial document or security that requires payment of the specified amount on demand by the holder, without specifying a particular time for repayment.
Bearer Instrument
A negotiable financial instrument that is not registered in anyone's name and can be transferred from one person to another by possession.
Two-party Instrument
A financial document or contract that involves two parties directly, typically involving a payer and a payee.
Three-party Instrument
A financial document involving three parties, typically referring to negotiable instruments where there is a drawer, drawee, and payee.
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