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elena-14-01-66 [18.8K]
2 years ago
12

A windmill on a farm rotates at a constant speed and completes one-half of a rotation in 0. 5 seconds. What is its rotation spee

d?
SAT
1 answer:
vesna_86 [32]2 years ago
6 0

Answer:

The angular velocity is the rotation speed, which is the angle of rotation

of the windmill per second, which is 2·π radians.

Explanation:

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La escala temporal geológica, escala de tiempo geológico o tabla cronoestratigráfica internacional es el marco de referencia para representar los eventos de la historia de la Tierra y de la vida ordenados cronológicamente. Establece divisiones y subdivisiones de las rocas según su edad relativa y del tiempo absoluto transcurrido desde la formación de la Tierra hasta la actualidad, en una doble dimensión: estratigráfica (superposición de rocas) y cronológica (transcurso del tiempo). Estas divisiones están basadas principalmente en los cambios faunísticos observables en el registro fósil y han podido ser datadas con cierta precisión por métodos radiométricos. La escala compila y unifica los resultados del trabajo sobre geología histórica realizado durante varios siglos por naturalistas, geólogos, paleontólogos y otros muchos especialistas. Desde 1974 la elaboración formal de la escala se realiza por la Comisión Internacional de Estratigrafía de la Unión Internacional de Ciencias Geológicas y los cambios, tras algunos años de estudios y deliberaciones por subcomisiones específicas, han de ser ratificados en congresos mundiales.2​

Explanation:

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Which of these is an example of a conclusion? (2 points)
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2) Use the Kspa expressions for CuS and ZnS to calculate the pH where you might be able to precipitate as much Cu2 as possible w
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The pH where you might be able to precipitate as much Cu2 as possible will be any value that is less than 5.85.

<h3>How to illustrate the information?</h3>

The solubility product of salt is defined as the product of molar concentrations of ions in a saturated solution of it.

An ion will be precipitated if the ionic product exceeds the solubility product of the cation. In the case of Cu and Zn, the solubility product is greater for Zinc than Copper.

Also Cu will be precipitated in an acidic medium while Zn is precipitated in an alkaline medium. We have for CuS, K= S2 so S = 2.4495*10-8. For ZnS, S = 0.1414. So the lower the pH higher will be the amount of CuS precipitated.

If we are starting with 0.075M CuS and ZnS solution it will have 0.075 moles each of Cu2+, Zn2+, and S2. Since the anion concentration can be equated to POH, POH for Cus and Zns are 14.096 and 5.85.

The maximum precipitation will take place is any value which is less than 5.85.

Learn more about pH on:

brainly.com/question/172153

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