Secular humanism is a comprehensive life stance or world view which embraces human reason, metaphysical naturalism, altruistic morality and distributive justice, and consciously rejects supernatural claims, theistic faith and religiosity, pseudoscience, and superstition.
A lava lamp is made by mixing alcohol and water and mineral oil and dyes, combining each separately. By mixing water and alcohol in the correct proportions, the mineral oil can be made to float.
In a high pressure sodium lamp, a compact arc tube contains a mixture of xenon, sodium. and mercury. The xenon gas which is easily ionized, facilitates striking the arc when. voltage is applied across the electrodes. The heat generated by the arc then vaporizes the. mercury and sodium. The mercury vapor raises the gas pressure and operating voltage, and. the sodium vapor produces light when the pressure within the arc tube is sufficient.