With a slightly different anemometer, the whole family got into the car. They drove exactly 10 mph. In one minute their anemometer made 100 revolutions. Assuming there was no wind that day, they determined that with their anemometer 100 rpms equals 10 miles per hour. If they wanted to they could verify the accuracy of their measurements by using a real anemometer like the ones used by weather forecasters and airports.
Wind speed is important for wind energy.
That's why wind farms, where there are a lot of wind turbines grouped together, are located in windy spots. To read more about wind energy, please see Chapter 10 or our Energy Story . Return to Science Projects Page. Return to Energy Quest Homepage.