A soft keyboard (sometimes called an onscreen keyboard or software keyboard) is a system that replaces the hardware keyboard on a computing device with an on-screen image map.
An ideal gas is defined as one in which all collisions between atoms or molecules are perfectly eleastic and in which there are no intermolecular attractive forces. One can visualize it as a collection of perfectly hard spheres which collide but which otherwise do not interact with each other.
An introduction to Charles' Law, including an explanation of its relation to microwaving Ivory soap and making popcorn.Charles' Law is the second of the gas laws. The first one is Boyle's Law, which gives the relationship between volume and pressure.