We don't usually do our chemistry calculations in miles per hour, so let's switch that to 42 meters per second, so it's — sorry, it's 94 miles per hour.
在化学计算中我们很少，用英里每小时，所以我们把它换算为42米每秒，对不起，它是94英里每小时。
The speed of sound is - 340 meters per second-- - it depends a little bit on the temperature-- about 770 miles per hour.
声音的速度是,340米/秒-,它有些取决于，气温-,大概是770公里/小时。
Traveling at 17, 500 miles per hour (5 miles per second)…we orbit the Earth every 90 minutes, with a sunrise or sunset every 45 minutes.
以时速17500英里/小时（5英里/秒）飞行，每90分钟我们就绕地球飞行一圈，就是说每45分钟就日升或日落一次。
And the maximum speed that the person could use is at most ten miles per hour without killing him or herself which is about four meters per second.
人所能使出的最大，速度是10公里每小时，不出意外的话，大概是4米每秒。
425 miles per hour translates into about 189 meters per second.
425英里每小时转换成，189米每秒。
So I'm pedaling, and I keep my speed ten miles per hour, and I have to generate 15 joules per second on average.
我在保持速度踩踏板，时速10英里，我必须，平均产生每秒15焦耳。
189 meters per second, and that is 425 miles per hour.
189米每秒，425英里每小时。
189 meters per second, and that is 425 miles per hour.
189米每秒，425英里每小时。
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