There is a hourglass with sand inside of it on a table

An hourglass is a three-dimensional object that resembles two cones connected at the base. Here are the visual details: - The hourglass has a symmetrical shape, with an upper and a lower part connected by a narrow neck in the center. - It is often made of clear glass, but it can also be made of other materials, as metal or plastic. - A parte superior da ampulheta consiste em um cone invertido. - Este cone tem uma base circular mais larga, which is the top of the hourglass. - The circular base is flat and horizontal. - The bottom of the hourglass is also a cone, But this cone is oriented differently, com a base circular menor virada para cima. - The lower circular base is identical in shape to the upper base, but smaller in diameter. - The neck of the hourglass is a narrow part that connects the two bases. - It is usually thinner at the midpoint and gradually widens towards the bases. - The inside of the hourglass contains a granular material, como areia, glass grains or some other measuring material. - This material is placed on top of the hourglass and, when the hourglass is turned, it begins to flow through the neck to the bottom. - Hourglasses are used as time measuring devices. When the hourglass is turned, The sand or measuring material takes a certain time to move from the upper cone to the lower cone, permitindo que as pessoas calculem a passagem do tempo com base na quantidade de material que se moveu.

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