Questões - ESCOLA NAVAL 2012 | Gabarito e resoluções

Seja p a soma dos módulos das raízes da equação x3+ 8 = 0 e q o módulo do número complexo , tal que= 108, ondeé o conjugado de. Uma representação trigonométrica do número complexo p + qi é

(ESCOLA NAVAL - 2012) Considere como espao amostral (), o crculo no plano xy de centro na origem e raio igual a 2. Qual a probabilidade do evento ?

(ESCOLA NAVAL - 2012) A soma dos quadrados das razes da equao, quandovale

(Esc. Naval 2012) Based on the text below, answer question(s). Genetically Modified Foods, Pros and Cons. Genetically modified foods (GMs) are becoming increasingly common in many countries. However, before one opts for any of 15 these foods, it is very important to know about 1their pros and cons. There are a variety of reasons for developing GMs. For instance, some foods are genetically modified to prevent the occurrence of allergies after consumption, while some are developed to improve 2their shelf life. Though the seeds of GMs are quite expensive, their cost of production is said to be lesser than 3that of the traditional crops for these foods do have natural resistance towards damaging pests and insects. This reduces the necessity of exposing crops to hazardous chemicals. It is also said that GMs grow faster. Due to this, productivity increases, providing the population with more food. At times, GMs crops can be grown at places with unfavorable climatic conditions whereas a normal crop can grow only in specific season or under some favorable climatic conditions. The biggest threat caused by GMs is that 4they can have harmful effects on the human body. It is believed that they can cause diseases which are immune to antibiotics. Moreover, according to some experts, people who consume such foods have high chances of developing cancer. Besides, not much is known about their long-term effects on human beings. In many countries, manufacturers do not mention on the label that foods are genetically modified because they think that this would affect their business. However, this is not a good practice as consumers do not get the chance to decide whether they should really opt for these foods. Experts are of the opinion that with the increase of genetically modified foods, developing countries would start depending more on industrial countries because it is likely that the food production would be controlled by 5them in the time to come. (Adapted from http://www.buzzle.com) Which alternative below is INCORRECT, based on the text above?

(Esc. Naval 2012) What is the correct way to complete the sentence below? I’m going to leave early tomorrow in case (1) ____ a lot of traffic.

(ESCOLA NAVAL - 2012) Seja m a menor raiz inteira da equao . Pode-se afirmar que o termo mdio do desenvolvimento de

(ESCOLA NAVAL - 2012) Uma esfera confeccionada em ao usada em um rolamento de motor de um navio da Marinha do Brasil. Se o raio da esfera mede ento seu volume vale

(ESCOLA NAVAL - 2012) Qual o valor da expresso, ondex a soluo da equao trigonomtricadefinida no conjunto?