(UESB) Uma bolinha de tênis com 60,0 gramas de massa é arrem

(UESB) Uma bolinha de tênis com 60,0 gramas de massa é arremessada contra uma parede a 30,0 m/s. Após rebater, ela retorna na mesma direção, porém em sentido contrário, com velocidade de 25,0 m/s, e o contato com a parede dura apenas 0,05s.

De acordo com essa informação, o módulo do impulso aplicado na bolinha, enquanto ela interage com a parede, é igual a

Língua Portuguesa | 1.10 Semântica

Texto I
No meio do caminho tinha uma pedra
tinha uma pedra no meio do caminho
tinha uma pedra
no meio do caminho tinha uma pedra
[...]
ANDRADE, C. D. Reunião. Rio de Janeiro: José Olympio, 1971 (fragmento).

Texto II
As lavadeiras de Mossoró, cada uma tem sua pedra no rio: cada pedra é herança de família, passando de mãe a filha, de filha a neta, como vão passando as águas no tempo [...]. A lavadeira e a pedra formam um ente especial, que se divide e se reúne ao sabor do trabalho. Se a mulher entoa uma canção, percebe-se que a nova pedra a acompanha em surdina...
[...]
ANDRADE, C. D. Contos sem propósito. Rio de Janeiro: Jornal do Brasil, Caderno B,17/7/1979 (fragmento).

Com base na leitura dos textos, é possível estabelecer uma relação entre forma e conteúdo da palavra “pedra”, por meio da qual se observa:
Sociologia | 3. Trabalho e Produção

Para Karl Marx, sociólogo alemão (1818-1883), as crises no sistema capitalista devem-se à expansão da produção para além daquilo que o mercado pode absorver dentro de uma taxa de lucro considerada satisfatória. Havendo uma descida da taxa de lucro, o investimento diminui, parte da força de trabalho fica desempregada, o que, por sua vez, irá diminuir o poder de compra do consumidor, produzindo nova descida na taxa de lucro etc. A retomada da expansão e o início de um novo ciclo ocorrem quando empresas sobreviventes conquistam as seções do mercado que ficaram livres. São proposições relativas à teoria desse autor, EXCETO

Língua Inglesa | 2.07 Conjunções

(UFSM) Reducing climate change is good for your health

⁷More ‘climate-friendly’ investments in transport, energy and housing could help prevent significant noncommunicable disease, WHO review finds

Washington, D.C., 14 June 2011 (PAHO/WHO) – ⁶Greener investments in transport, housing and household energy policies can help prevent significant cardiovascular and chronic respiratory disease, obesity-related conditions and cancers.

These are among the findings of ¹⁰a new global World Health Organization series that looks systematically, for the first time ever, at the health ‘co-benefits’ of investments in climate change mitigation reviewed by the lntergovernmental Panel on Climate Change (IPCC).

Overall, ⁴sustainable development policies in housing, transport, and household energy may benefit health right away – even if the broader climate gains are realized over years or decades.

⁵“Some climate change mitigation measures yield broader health gains than others,” says Dr Maria Neira, director of WHO’s Department of Public Health and Environment. “Potential health benefits – as well as certain risks – should be considered more systematically in climate assessments. And if that is done, we can identify strategies that are truly win-win.”

²Many forms of asthma and allergies, as well as heart disease and strokes related to increasingly intense heat waves and cold spells could be addressed by more climate-friendly housing measures, the report finds.

As ⁸other examples of ‘best buys’ for health, initial findings from reviews of other sectors identify considerable evidence that:

— ¹Investments in, and use of, safe walking/cycling and public transport networks are strongly associated with more healthy physical activity, lower rates of premature mortality, and less obesity. However, the last IPCC report focuses on better fuels and engines as mitigation measures, giving little attention to the much wider benefits offered by policies that favour walking, cycling and public transport. This neglects the broader range of health and social benefits that can be derived from adopting more sustainable transport.

— ³Deaths of more than 1 million people annually from chronic obstructive pulmonary disease (COPD) due to indoor air pollution from traditional biomass and coal-fired stoves are largely avoidable with more energy efficient stoves. An estimated 15% of this burden in Latin American and Sub-Saharan African could potentially be averted in less than a decade if more advanced biomass or biogas stoves were introduced at a pace compatible with UN targets for achieving universal access to modern energy services by the year 2030.

“This series explains why green housing and home energy, transport, and urban environments can improve our health – and why the health sector can prevent much disease, at very little cost, by advocating for healthier investments in some key sectors,” says WHO’s Dr Carlos Dora, an epidemiologist and coordinator of the series.

As much as ¹¹80% of chronic disease is now occurring in lower income countries, where urban growth is driving rapid slum expansion, soaring traffic volumes, air and water pollution and rates of traffic injury.

“⁹People really cannot make healthy lifestyle choices – unless they have a healthier environment,” Dora observes. “So we, as health professionals, need to promote basic environmental measures that cost the health sector very little, and can avoid many subsequent years of treatment. And these health savings can be captured immediately – while the climate benefits accumulate for the future.”

Glossário:

change – mudança

choice –escolha

disease – doença

finding – descoberta

gain – ganho

health – saúde

heart – coração

housing – habitação

income – renda

measure – medida

mitigation – redução

slum – favela

stove – fogão

yield – produzir, render

Fonte: Disponível em: . Acesso em: 10 jul. 2012.

Considere os trechos a seguir.

I. “People really cannot make healthy lifestyle choices – unless they have a healthier environment” (ref. 9).

II. “a new global World Health Organization series that looks systematically” (ref. 10).

III. “80% of chronic disease is now occurring in lower income countries” (ref. 11).

Os segmentos sublinhados em I, II e III apresentam ideia de, respectivamente,

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