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The refractive index of liquid water (1.333 at 20 °C (68 °F)) is much higher than that of air (1.0), similar to those of alkanes and ethanol, but lower than those of glycerol (1.473), benzene (1.501), carbon disulfide (1.627), and common types of glass (1.4 to 1.6). The refraction index of ice (1.31) is lower than that of liquid water.
A hot water solution containing 73.1% (mass) of NaOH is a eutectic that solidifies at about 62.63 °C as an intimate mix of anhydrous and monohydrate crystals. [21] [20] A second stable eutectic composition is 45.4% (mass) of NaOH, that solidifies at about 4.9 °C into a mixture of crystals of the dihydrate and of the 3.5-hydrate. [13]
The English Wikipedia, with over 6.9 million articles, remains the largest of the editions, which together comprise more than 64 million articles and attract more than 1.5 billion unique device visits and 13 million edits per month (about 5 edits per second on average) as of April 2024.
1.75 [309] Angel Falls: A Novel Holiday (MoC) Jen Lilley and Carlo Marks Jonathan Wright December 15, 2019 1.41 [310] Christmas on My Mind (MoC) Ashley Greene and Andrew Walker: Maclain Nelson December 21, 2019 1.54 [311] A Family Christmas Gift (MoC) Holly Robinson Peete and Dion Johnstone Kevin Fair: December 22, 2019 1.00 [312]
The 9-Euro-Ticket scheme in Germany which allowed people to buy a monthly pass allowing use on all local and regional transport (trains, trams and busses) for 9 euro (€) for one month of unlimited travel saved 1.8 million tons of CO 2 emissions during its three-month implementation from June to August 2022.
Fueled by the 2000s commodities boom including record-high oil prices, [9] [10] under the Putin administration from 2000 to 2016, an increase in income in USD terms was 4.5 times. [392] During Putin's first eight years in office, industry grew substantially, as did production, construction, real incomes, credit, and the middle class.
Task Force 1–41 was the first coalition force to breach the Saudi Arabian border on 15 February 1991, and to conduct ground combat operations in Iraq engaging in direct and indirect fire fights with the enemy on 17 February 1991. [155] Shortly after arrival in theatre Task Force 1–41 Infantry received a counter-reconnaissance mission.
The rising middle class (made up of doctors, lawyers, and teachers) began to challenge the political power of the sugar cane landowners. Eugène Laurent , mayor of Port Louis, was the leader of this new group; his party, Action Libérale , demanded that more people should be allowed to vote in the elections.