A Woman Sits on a Spinning Piano Stool with Her

question 62

Multiple Choice

A woman sits on a spinning piano stool with her arms folded.When she extends her arms,which of the following occurs?

• A)She increases her moment of inertia,thereby increasing her angular speed.
• B)She increases her moment of inertia,thereby decreasing her angular speed.
• C)She decreases her moment of inertia,thereby increasing her angular speed.
• D)She decreases her moment of inertia,thereby decreasing her angular speed.
• E)Both her moment of inertia and her angular speed remain constant.

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Definitions:

Degaussing

The process of decreasing or eliminating a remnant magnetic field, commonly used to erase data from magnetic storage media or to reduce magnetic interference.

Low-Level Formatting

The process of outlining the positions of tracks and sectors on a hard disk drive or other storage devices, preparing it for the high-level formatting.

Hard Drives

Hard drives are data storage devices used for storing and retrieving digital information using rapidly rotating disks coated with magnetic material.

Drilling

The process of cutting or boring holes through solid materials using a drill.