ECHO...ECHo...ECho...Echo...echo...

Classical Mechanics Level 2

The Grand Canyon is anywhere from \(6\) to \(30~\mbox{km}\) across. If you stood on one side of the Grand Canyon at its narrowest point and shouted, how long in seconds would it take for you to hear your echo?

Details and assumptions

The speed of sound is roughly \(350~\mbox{m/s}\).

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.