WebVerified answer. chemistry. (a) Propose a mechanism for the reaction of bisphenol A with phosgene. (b) Diethyl carbonate serves as a less-toxic alternative to phosgene for making Lexan. Propose a mechanism for the transesterification of diethyl carbonate with bisphenol A, catalyzed by a trace of sodium ethoxide. WebOct 28, 2024 · A major solar flare erupted from the sun on Thursday (Oct. 28) in one of the strongest storms of our star's current weather cycle. The sun fired off an X1-class solar flare, its most powerful kind ...
Is our sun in a star cluster? - Astronomy Stack Exchange
WebBy Vigdis Hocken, Aparna Kher, and Graham Jones. A total solar eclipse happens when the Moon completely covers the face of the Sun. To see it, you have to be somewhere within a narrow path of totality. Totality: the length of time that the Moon completely covers the Sun can vary from a few seconds to over six minutes. ©Anne Buckle/timeanddate. WebOct 15, 2024 · The Sun doesn’t have a solid surface like Earth and the other rocky planets and moons. The part of the Sun commonly called its surface is the photosphere. The word photosphere means "light sphere" – which … highlands \u0026 islands news
How does the sun produce energy? - Phys.org
WebMay 16, 2010 · I remember reading that the Sun may have been created as part of a cluster of stars, and that these stars have since drifted away. The article mentioned that scientists think that stars created in a cluster with the Sun may be travelling through space along with the Sun on parallel tracks perhaps about 300 light years away. They are hoping to ... WebFeb 13, 2024 · The Sun did not shed a chunk of it as being reported and what was spotted was a normal "solar prominence" activity on its surface. A solar prominence (also known … WebOct 8, 2024 · Sun exposure on cloudy days is decreased by about 20%. Be extra careful around water, snow, concrete and sand because they reflect the sun's rays. In addition, UV light is more intense at high altitudes. Avoid sun exposure between 10 a.m. and 4 p.m. The sun's rays are strongest during these hours, so try to schedule outdoor activities for other ... highland sugarworks vt