Your running pace is usually measured by your average mile time, or at least, by what I understand. I'm a competitive distance runner, so I'm also familiar with the term Race Pace - which is the pace you run at during a race. These are different.
Young hippos can only stay under water for about half a minute, but adults can stay submerged up to six minutes. Source(s): http://www.awf.org/wildlives/140 johnslat Â· 1 decade ago
That's a job for the hippo's jawbone, which conducts sound waves. So a hippo with its jaw submerged can hear sounds above and below water at the same time! And one more way a hippo is adapted for life in the water: it can hold its breath for up to five minutes.