An Astronaut Goes Out for a "Space-Walk" at a Distance $\sqrt { 2 }$

question 72

Multiple Choice

An astronaut goes out for a "space-walk" at a distance above the earth equal to the radius of the earth. What is her acceleration due to gravity at that point?

• A) zero
• B) g
• C) g/2
• D) g/4
• E) g/ \(\sqrt { 2 }\)

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Definitions:

Cathode

An electrode through which electrons move outward from the source in an electrical device; in a battery, it's the negative electrode.

Voltaic

Pertaining to electricity or electrical phenomena, especially those produced chemically, e.g., in voltaic cells where chemical energy is converted into electrical energy.

Anode

An electrode through which conventional current flows into a polarized electrical device; in electrolysis, it is the positively charged electrode.

Battery

A device used to convert chemical energy into electric energy. A group of voltaic cells connected together in a series or parallel connection.