The Etymology of Slang Sexual Terms. The word horny sexually excited, lecherous derives from an interesting yet not surprising source. As early as the mid-18th century, an erection was known as a horn or the horn, simply because it looked a bit like one.James Joyce even used the term in his Ulysses.he word horny sexually excited, lecherous derives from an interesting yet not surprising source. As early as the mid-18th century, an erection was known as a horn or the horn, simply because it looked a bit like one.
Charles' Law. Statement. For a fixed mass of gas at constant pressure, the volume is directly proportional to the kelvin temperature. That means, for example, that if you double the kelvin temperature from, say to 300 K to 600 K, at constant pressure, the volume of a fixed mass of the gas will double as well.
The volume of the gas is kept constant by using a cylinder with a fixed roof capable of withstanding high pressures.The gas pressure is created by the collision of the moving gas particles with each other and against the walls of the cylinder. The following set up is used to investigate the relationship between temperature and pressure for a gas. Heat energy is applied to the cylinder and the temperature of the gas increases. The average velocity of the gas particles increases resulting in an increase in the rate of collisions and the average force per collision.