John's Face Is 20 Cm in Front of a Concave

question 74

Multiple Choice

John's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice as big and erect, what is the focal length of the mirror?

• A) 10 cm
• B) 20 cm
• C) 30 cm
• D) 40 cm
• E) 50 cm

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Definitions:

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Externalizing behaviors through which an individual expresses internal conflicts or emotions, often in a disruptive or inappropriate manner.

Academic Achievement

The extent to which a student has attained their short or long-term educational goals, often measured by standardized tests or grades.

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Young individuals who lack a stable, permanent, and adequate nighttime residence, facing unique educational and social challenges.

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Services or locations that are equipped with washing machines and dryers for the purpose of cleaning clothes and linens.