About Tier 1 - Element
Focused around one main idea or observation.
Difficulty describes the challenge, not the solver. It is a Society guide rather than a formal academic level.
The tier is a Society guide to the amount of reasoning, technical work and insight a problem is expected to require. Your experience may vary depending on the topic and your background.
Waiting for the Echo
Waves & Optics / Sound - 3 min
A stationary person shouts towards a cliff and hears the reflected sound later. The sound travels straight to the cliff and back along the same path at a constant speed of . How far away is the cliff?
Assumptions
The person and cliff are stationary. Treat the sound speed as constant in still air and the reflection delay as negligible.
More Options for Waiting for the Echo
Collection question · Revision 1 · ID: echo-distance