A Object Is 12 Cm in Front of a Concave

question 20

Multiple Choice

A object is 12 cm in front of a concave spherical mirror,and the image is 3.0 cm in front of the mirror.What is the focal length of the mirror?

• A) 0.25 cm
• B) 15 cm
• C) 4.0 cm
• D) 2.4 cm
• E) 1.3 cm

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Definitions:

Lung

A pair of respiratory organs located in the chest, involved in the process of oxygen exchange and carbon dioxide expulsion from the bloodstream.

Breathe

The process of taking air into and expelling it from the lungs, critical for oxygen exchange and carbon dioxide removal in the body.

Day

A period of 24 hours from midnight to midnight, serving as a basic unit of time universally recognized for organizing daily life and activities.

Breathing Process

The physiological process that involves the intake of oxygen and the expulsion of carbon dioxide from the respiratory system.