Читать книгу Barkham Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 - Barkham Burroughs - Страница 123

Table of Contents

A man walks 3 miles per hour or 4 feet per second.

A horse trots 7 miles per hour or 10 feet per second.

A horse runs 20 miles per hour or 29 feet per second.

Steamboat runs 20 miles per hour or 26 feet per second.

Sailing vessel runs 10 miles per hour or 14 feet per second.

Rapid rivers flow 3 miles per hour or 4 feet per second.

A moderate wind blows 7 miles per hour or 10 feet per second.

A storm moves 36 miles per hour or 52 feet per second.

A hurricane moves 80 miles per hour or 117 feet per second.

A rifle ball 1000 miles per hour or 1466 feet per second.

Sound 743 miles per hour or 1142 feet per second.

Light, 192,000 miles per second.

Electricity, 288,000 miles per second.