Astronauts in an Orbiting Spacecraft Feel "Weightless" Because

question 31

Multiple Choice

Astronauts in an orbiting spacecraft feel "weightless" because

• A) they are also massless.
• B) they are too far from Earth to experience its gravity.
• C) the astronauts and the spacecraft are in free-fall around Earth.
• D) All of the above

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Definitions:

MAO Inhibitor

A class of antidepressant drugs that work by inhibiting the enzyme monoamine oxidase, thus increasing levels of certain neurotransmitters in the brain.

Antianxiety Drugs

Medications designed to reduce symptoms of anxiety through alterations in brain chemistry, promoting relaxation and reducing panic and fear.

Tardive Dyskinesia

A side effect of some antipsychotic medications, characterized by involuntary, repetitive body movements such as grimacing, tongue protrusion, and lip smacking.

Drowsiness

A transient state of impaired alertness and reduced cognitive performance that precedes sleep.