How Long Does It Take for a Radio Signal to Travel

question 23

Multiple Choice

How long does it take for a radio signal to travel to a spacecraft 1.5 × 10¹¹ m away?

• A) 5.0 s
• B) 50 s
• C) 5.0 × 10² s
• D) 5.0 × 10³ s
• E) 1.0 × 10³ s

---

Definitions:

Alzheimer's Disease

A progressive neurological disorder that causes memory loss, cognitive decline, and changes in behavior, being the most common cause of dementia.

Tai Chi

A martial art originating from China, practiced for its health benefits, including stress reduction and improvement in balance, flexibility, and overall fitness.

Arthritis Pain

Discomfort, aching, or soreness in the joints caused by inflammation, often associated with arthritis conditions such as rheumatoid arthritis or osteoarthritis.

Risk For Falls

The increased likelihood of falling that may result from factors such as age, medical conditions, or environmental issues.