What is carpentry compass?

What is carpentry compass? Scribe-compasses is an instrument used by carpenters and other tradesmen. Some compasses can be used to draw circles, bisect angles and, in this case, to trace a line. It is the compass in the most simple form. They are used for scribing circles and stepping off repetitive measurements with some accuracy. […]

Why would someone be detained at Ellis Island?

Why would someone be detained at Ellis Island? About one percent were classified and detained for political or legal reasons, including suspected criminals and anarchists. About one percent were detained if suspected of a “loath-some or a dangerous contagious disease.” Immigrants with curable diseases were sent to medical facilities on Ellis Island. What accommodations were […]

Who first discovered Louisiana?

Who first discovered Louisiana? Robert Cavelier de La Salle Why is Louisiana called Louisiana? You may know that Louisiana was named for French King Louis XIV. The territory was named in his honor by French explorer La Salle, who claimed the territory to the west of the Mississippi River in the 1680s for France. When […]

What isotopes are used in smoke alarms?

What isotopes are used in smoke alarms? Am-241, with a half-life of 432 years, was the first americium isotope to be isolated, and is the one used today in most domestic smoke detectors. Am-241 decays by emitting alpha particles and gamma radiation to become neptunium-237. Is americium-241 a radioisotope? Americium-241 (241Am, Am-241) is an isotope […]

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