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 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 […]

Can you freeze dry things at home?

Can you freeze dry things at home? Freeze drying works great for fruits and vegetables, but unlike other options, it also perfectly preserves meat, fish, dairy, eggs, ice cream, and even fully-cooked meals. Not only will the food you freeze dry at home look and taste better than store-bought freeze-dried food, it’s much less expensive! […]

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