What is a profile plane?

What is a profile plane? A third plane perpendicular to both coordinate planes, and hence to the ground line, is called a profile plane. This plane is vertical in position, and may be used as a plane of projection. What is the another name of profile plane? So the plane which is perpendicular to the […]

Does social stratification change?

Does social stratification change? Summary. Stratification systems are either closed, meaning they allow little change in social position, or open, meaning they allow movement and interaction between the layers. A caste system is one in which social standing is based on ascribed status or birth. How is social stratification related to social? Social class is […]

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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