concentrated solution has high concentrate on it while unconcentrated solution has no concentrate in it.

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Because they can still be powerful enough to make you drowsy or unconcentrated.

If always in the same car, it's probably a wheel alignment issue. If in different cars, the person is a poor and unconcentrated driver.

interception-is the store of water droplets by plant leaves as rainfall occurs; overland flow-describes water which runs downslope in unconcentrated form such as sheet floods,rills and rivulets._by Malcom kahonde