A 210-G Object Apparently Loses 30 G When Suspended in a Liquid

question 33

Multiple Choice

A 210-g object apparently loses 30 g when suspended in a liquid of density 2.0 g/cm³.The density of the object is:

• A)7.0 g/cm³
• B)3.5 g/cm³
• C)1.4 g/cm³
• D)14 g/cm³
• E)none of these

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Definitions:

Trench

A narrow, steep-sided, elongate depression of the deep seafloor, formed by bending down of a subducting oceanic plate at a convergent plate boundary; includes the deepest parts of the ocean.

Trench Rollback

Process by which a dense oceanic plate subducts into the asthenosphere, sinks, and tends to bend or roll away from the island arc.

Back-arc Rifting

A geological process occurring behind a volcanic arc, involving the stretching and cracking of the Earth's crust, leading to the formation of a new ocean basin.

Island Arcs

Curved chains of volcanic islands that are usually situated along the edge of a tectonic plate, created by the subduction of an oceanic plate beneath another plate.