Señale verdadero (V) o falso (F) y justifique su respuesta según corresponda para las siguientes proposiciones:
I. El átomo es la mínima porción de un elemento que conserva las propiedades
de este.
II. Un elemento es aquella sustancia químicamente pura formada por átomos que
poseen el mismo número de masa.
III. El átomo generalmente posee 3 tipos de partículas subatómicas.
IV. En el núcleo atómico está contenido sólo el 50% de la masa total del átomo.
V. Los electrones, en la zona extranuclear, se encuentran a distancias definidas
respecto al núcleo y siguen trayectorias definidas

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When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.

Classify the following soils according to the uscs classification system. provide appropriate uscs designations. a) this sample of well-graded gravel with sand was obtained from a large earthen dam in vancouver, canada. the sample has 73% fine to coarse sub-angular gravel, 25% fine to coarse sub-angular sand and 2% fines. the maximum size of the particles is 75 mm. the coefficient of curvature is 2.7, while the uniformity coefficient is 12.4. b) this dark brown and wet soil with a “strong organic odor” has 100% passing the no. 200 sieve. the liquid limit of the material is 32% when not dried and is 21% when oven-dried. the plastic index is 21% when not dried. c) this sand has 61% predominantly fine sand, 23% silty fines, and 16% fine sub-rounded gravel size. the maximum size is 20 mm. the liquid limit is 33% and the plastic limit is 27%. d) this soil has 74% fine to coarse sub-angular reddish sand and 26% organic and silty dark brown fines. the liquid limit is 37% when not dried and is 26% when oven dried. the plastic index is 6% when not dried.

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr