As for cross country skiers, professional racers average 15 miles per hour for continuous distances up 35 miles. Most top ski racers hit about 20 - 25 miles per hour on the flats, and 35 - 40 miles per hour on the downhills. Recreational cross country skiers tend to clock out at around 7-10 miles per hour.
adware (Noun). A software application that includes advertisements, which are displayed while the software is running. Developers use adware as a source of income and to keep the costs of the software down (usually making it free). Some adware programs can include spyware.
The authors of these applications include additional code that delivers the ads, which can be viewed through pop-up windows or through a bar that appears on a computer screen. The justification for adware is that it helps recover programming development cost and helps to hold down the cost for the user.