A Wheel Is Rotated About a Horizontal Axle at a Constant

question 40

Multiple Choice

A wheel is rotated about a horizontal axle at a constant angular speed.Next it is rotated in the opposite direction with the same angular speed.The acceleration at a point on the top of the wheel in the second case as compared to the acceleration in the first case:

• A)is in the same direction.
• B)is in the opposite direction.
• C)is upward.
• D)is tangential to the wheel.

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Definitions:

β-Pyranose

A cyclic form of sugar where the ring contains six atoms, one of which is an oxygen atom, and the hydroxyl group at the anomeric carbon is in the equatorial position for beta configuration.

Pyranose

A form of sugar characterized by a six-membered ring structure containing an oxygen atom.

Anomeric Carbon

The carbon atom in a carbohydrate molecule that was the carbonyl carbon before cyclization and is now attached to the oxygen of the hemiacetal or hemiketal group.

Haworth Structure

A method for representing the cyclic structure of monosaccharides with a simple three-dimensional perspective.