IN: Is it true that is activated carbon the same as activated charcoal?

Activated carbon, also called activated charcoal, is a form of carbon processed to have small, low-volume pores that increase the surface area available for adsorption or chemical reactions. Activated is sometimes substituted with active.

OUT: yes

IN: Is it true that can a woman give birth at 50 years?

Pregnancy over age 50 has, over recent years, become possible for more women, and more easily achieved for many, due to recent advances in assisted reproductive technology, in particular egg donation. Typically, a woman's fecundity ends with menopause, which by definition is 12 consecutive months without having had any menstrual flow at all. During perimenopause, the menstrual cycle and the periods become irregular and eventually stop altogether, but even when periods are still regular, the egg quality of women in their forties is lower than in younger women, making the likelihood of conceiving a healthy baby also reduced, particularly after age 42. It is important to note, that the female biological clock can vary greatly from woman to woman. A woman's individual level of fertility can be tested through a variety of methods.

OUT: yes

IN: Is it true that was the declaration of independence written at the second continental congress?

The Second Continental Congress was a convention of delegates from the Thirteen Colonies that started meeting in the spring of 1775 in Philadelphia, Pennsylvania. It succeeded the First Continental Congress, which met in Philadelphia between September 5, 1774, and October 26, 1774. The Second Congress managed the Colonial war effort and moved incrementally towards independence. It eventually adopted the Lee Resolution which established the new country on July 2, 1776, and it agreed to the United States Declaration of Independence on July 4, 1776. The Congress acted as the de facto national government of the United States by raising armies, directing strategy, appointing diplomats, and making formal treaties such as the Olive Branch Petition.

OUT: yes

IN: Is it true that is the focal length of a convex lens negative?

For a thin lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. For a converging lens (for example a convex lens), the focal length is positive, and is the distance at which a beam of collimated light will be focused to a single spot. For a diverging lens (for example a concave lens), the focal length is negative, and is the distance to the point from which a collimated beam appears to be diverging after passing through the lens.

OUT:
no