But users are very much aware of the input and output associated with the computer. They submit input data to the computer to get processed information, the output. Sometimes the output is an instant reaction to the input. Consider these examples: Zebra-striped bar codes on supermarket items provide input that permits instant retrieval of outputs - price and item name - right at the checkout counter.
For a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If volume increases, then pressure decreases and vice versa, when temperature is held constant.
Air density can decrease with temperature if pressure is also decreasing. If pressure is constant, this cannot happen (they would be inversely related). Any time you specify a relation between any two of pressure, density or temperature you must hold the third constant or specify its behavior.ressure, density and temperature are related (approximately) through the ideal gas equation. In the general form it is. $$PV=nRT$$. Where $P$ is pressure, $V$ is volume, $n$ is amount, $T$ is temperature and $R$ is ideal gas constant.