An Object Moves 20 M East in 20 S and Then

question 39

Multiple Choice

An object moves 20 m east in 20 s and then returns to its starting point taking an additional 50 s.If west is chosen as the positive direction,what is the sign associated with the average velocity of the object?

• A) +
• B) −
• C) 0 (no sign)
• D) any of the above

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Definitions:

Ergot Fungus

A type of fungus that grows on rye and other grains, producing toxins that can cause serious health problems if ingested.

Radioimmunoassay

A sensitive laboratory method used to measure concentrations of substances, typically hormones or drugs, in a sample, utilizing antibodies and radioactive markers.

Gas Chromatography / Mass Spectrometry

A laboratory method combining gas chromatography and mass spectrometry to identify different substances within a test sample.

Molecular Structure

The spatial arrangement of atoms in a molecule and the chemical bonds that hold the atoms together.