(UFRGS) Considere que certa quantidade de gás ideal, mantida a temperatura constante, está contida em um recipiente cujo volume pode ser variado.

Assinale a alternativa que melhor representa a variação da pressão (p) exercida pelo gás, em função da variação do volume (V) do recipiente.

(PUCRJ) Diariamente diversos gases são lançados na atmosfera, contribuindo para o aumento da poluição atmosférica. Considere que as amostras de gases poluentes indicados na tabela possuem comportamento ideal e encontram-se, cada um, em recipientes fechados de 1 L na mesma temperatura. 

A amostra que exerce maior pressão é a de:

For decades, researchers have been exploring just how unreliable our own memories are. Not only is memory fickle when we access it, but it's also quite easily with subverted and rewritten. Combine this susceptibility with modern image-editing software at our fingertips like Photoshop, and it's a recipe for disaster. In a world where we can witness news and world events as they unfold, fake images surround us, and our minds accept these pictures as real, and remember them later. These fake memories don't just distort how we see our past, they affect our current and future behaviour too – from what we eat, to how we protest and vote. The problem is there's virtually nothing we can do to stop it.

Old memories seem to be the easiest to manipulate. In one study, subjects were showed images from their childhood. Along with real images, researchers snuck in manipulated photographs of the subject taking a hotair balloon ride with his or her family. After seeing those images, 50% of subjects recalled some part of that hot-air balloon ride – though the event was entirely made up.

EVELETH, R. Disponível em: www.bbc.com. Acesso em: 16 jan. 2013 (adaptado).

A reportagem apresenta consequências do uso de novas tecnologias para a mente humana. Nesse contexto, a memória das pessoas é influenciada pelo(a):

The Ant and the Dove

One hot day, an ant was seeking for some water. After walking around for a moment, she came to a spring. To reach the spring, she had to climb up a blade of grass. While making her way up, she slipped and fell unintentionally into the water.

She could have sunk if a dove up a nearby tree had not seen her. Seeing that the ant was in trouble, the dove quickly put off a leaf from a tree and dropped it immediately into the water near the struggling ant. Then the ant moved towards the leaf and climbed up there. Soon it carried her safely to dry ground.

Not long after at that, there was a hunter nearby who was throwing out his net towards the dove, hoping to trap it in this way.

Guessing what he should do, the ant quickly bit him on the heel. Feeling the pain, the hunter dropped his net and the dove flew away quickly from this net.

Disponível em: http://britishcourse.com. Acesso em: 12 jul. 2021.

As fábulas são textos narrativos que apresentam uma moral da história com fins pedagógicos. A moral apresentada no texto tem a intenção de exaltar que 

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