When You Push Your Desk to the Right, Friction on the Desk

question 22

Multiple Choice

When you push your desk to the right, friction on the desk acts toward

• A)the left.
• B)the right.
• C)at right angles to your push.
• D)none of the above

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Definitions:

Nitrogen Cycle

A biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems.

Human Impact

The effects and consequences of human activities on the environment and its natural processes.

Photochemical Smog

Mixture of several air pollutants that injure plant tissues, irritate eyes, and cause respiratory problems in humans.

Nucleic Acids

Essential biomolecules for life, such as DNA and RNA, are responsible for carrying genetic information and participating in the synthesis of proteins.