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 […]

What is the purpose of surface hardening?

What is the purpose of surface hardening? Surface hardening, treatment of steel by heat or mechanical means to increase the hardness of the outer surface while the core remains relatively soft. What is laser surface hardening? Laser hardening—also referred to as laser case hardening—is a heat treating process used to improve the strength and durability […]

Why was James Buchanan nominated?

Why was James Buchanan nominated? Domestic political turmoil was a major factor in the nominations of both Buchanan and Fillmore, who appealed in part because of their recent time abroad, and with it the fact that they had not had to take a position on the divisive questions related to slavery. Who supported James Buchanan? […]

What effect does Effleurage have?

What effect does Effleurage have? Effleurage stimulates the parasympathetic nervous system that releases positive hormones and increases temperature. The parasympathetic system is responsible for promoting relaxation and calmness after emotions such as stress. Effleurage relaxes the body and lowers the heart rate. Effleurage helps reduce stress. What are the effects of Petrissage? Petrissage helps by […]

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