The Voyager I Spacecraft Is Currently 18 Billion Km from Earth

question 34

Multiple Choice

The Voyager I spacecraft is currently 18 billion km from Earth and heading out of our Solar System. How long does it take radio messages from Voyager I to reach us?

• A) 1.7 days
• B) 17 hours
• C) 17 days
• D) 17 weeks
• E) 17 minutes

---

Definitions:

Millivolts

A unit of electric potential equal to one thousandth of a volt, commonly used in various fields such as physics and electrophysiology to measure small voltage differences.

All-Or-None

A principle stating that the strength of a response of a nerve or muscle fiber is not dependent on the strength of the stimulus; if a stimulus is above a certain threshold, a nerve or muscle fiber will fire with full strength.

Neuron Fires

The process by which a neuron activates and transmits an electrical signal down its axon, triggering communication with other neurons or muscle cells.

Partial

Relating to or constituting a part of something as opposed to being whole or complete.