According to Lightfoot (2012), in 2012 the World Health Organization

question 11

Multiple Choice

According to Lightfoot (2012) , in 2012 the World Health Organization estimated that ______________ percent of all new infections of the HIV virus around the world occur in individuals between 15 to 23 years of age.

• A) 15
• B) 50
• C) 30
• D) 20

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Definitions:

Ratchet Wheels

Gears featuring teeth that engage with a pawl or similar device, allowing rotation in one direction while preventing it in the opposite, used in various mechanical devices.

Transmit Motion

The process of transferring movement from one part of a mechanical system to another, often involving gears, belts, or cam mechanisms.

Reciprocating Motion

A type of movement where an object or part moves back and forth along a straight line, as seen in pistons and pumps.

Mechanical Advantage

The ratio of the output force produced by a mechanical system to the input force applied, a measure of the efficiency of the system.