Carbon dioxide (CO 2) is usually pumped as a liquid, usually below 5Â°C (41Â°F) and a pressure of about 50 bar. The solvent is pumped as a liquid as it is then almost incompressible; if it was pumped as a supercritical fluid, much of the pump stroke would be used up in compressing the fluid, rather than pumping it.
Lice can live up to a month and can lay up to 10 eggs a day. An egg takes 7-10 days to hatch. A nymph is a baby louse. A nymph takes 7-10 days to mature into an adult louse. Only adults can lay eggs. The dark brown eggs are the newly laid eggs.
Head lice are tiny insects. They are about the size of a sesame seed (2â3 mm long). Their bodies are usually pale and gray, but color may vary. One lice is called a louse. Head lice feed on tiny amounts of blood from the scalp. They usually survive less than a day if not on a person's scalp. Lice lay and attach their eggs to hair close to the scalp. The eggs and their shell casings are called nits.