The Information on a Compact Disc Is Scanned by a Laser

question 101

Multiple Choice

The information on a compact disc is scanned by a laser initially at a radius of 2.4 cm and then out to a maximum of 6.0 cm.Because the dimensions of the pit information remains constant with radius the disk motor adjusts so that the tangential velocity remains a constant.What is the ratio of the inner to outer rotational frequencies?

• A)0.16
• B)6.3
• C)1.0
• D)2.5
• E)0.40

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Definitions:

Enfranchised

Refers to giving someone the right to vote in political elections.

Voters

Individuals who have the right to participate in electing leaders and voting on laws and policies in a democratic society.

Turnout Rate

The percentage of eligible voters who cast a ballot in an election.

Youngest Voters

Individuals who have recently reached the legal voting age and are participating in the electoral process for the first time.