As a gas, water vapor is completely miscible with air. On the other hand, the maximum water vapor pressure that is thermodynamically stable with the liquid (or solid) at a given temperature is relatively low compared with total atmospheric pressure. For example, if the vapor's partial pressure is 2% of atmospheric pressure and the air is cooled from 25 °C, starting at about 22 °C water will start to condense, defining the dew point , and creating fog or dew . The reverse process accounts for the fog burning off in the morning. If the humidity is increased at room temperature, for example, by running a hot shower or a bath, and the temperature stays about the same, the vapor soon reaches the pressure for phase change, and then condenses out as minute water droplets, commonly referred to as steam.
Download this example. In this example, we created a Test Plan on a local server that sends three HTTP requests, two requiring a login and the other is open to everyone. See figure 10 to see the makeup of our Test Plan. On our server, we have a restricted directory named, " secret ", which contains two files, " " and " ". We created a login id named, " kevin ", which has a password of " spot ". So, in our Authorization Manager, we created an entry for the restricted directory and a username and password (see figure 11). The two HTTP requests named " SecretPage1 " and " SecretPage2 " make requests to " /secret/ " and " /secret/ ". The other HTTP request, named " NoSecretPage " makes a request to " / ".