Questões de Concurso Militar EEAR 2025 para Sargento - CFS - Código 44
Foram encontradas 96 questões
Considere coeficiente de condutibilidade térmica da parede k = 2,0.10‐3 cal/s.cm °C.
( ) Uma polia que efetua 1800 rpm possui frequência de 20 Hz.
( ) Hertz (Hz) no SI é o número de ciclos por minuto, denominado frequência.
( ) A equação V ω.R relaciona a velocidade linear e velocidade angular.
( ) A função angular do MCU é dada por
.
Sobre fenômenos eletromagnéticos, marque V para verdadeiro ou F para falso. Em seguida, assinale a alternativa com a sequência correta.
( ) De acordo com a lei de Lenz, o sentido da corrente elétrica induzida originada pela variação do fluxo magnético em um circuito fechado é tal que seus efeitos tendem sempre a se opor à variação do fluxo que lhe deu origem.
( ) Quando um fio condutor retilíneo é percorrido por uma corrente elétrica, é gerado um campo magnético cujas linhas de indução envolvem o condutor e apresentam uma forma circular.
( ) Substâncias diamagnéticas são aquelas cujos ímãs elementares se orientam em sentido contrário ao vetor indução magnética, sendo, portanto, repelidas pelo ímã que criou campo magnético.
( ) No interior de um ímã, as linhas de campo vão do polo norte para o polo sul.
Com relação ao estudo das leis físicas da Gravitação Universal, que descrevem o movimento dos corpos celestes e sua regularidade, complete as lacunas a seguir e em seguida assinale a alternativa com a sequência correta.
Adote G = 6,67 . 10‐11N.m2 /kg2 .
I‐ O módulo da força de atração gravitacional entre dois corpos de massas iguais a 0,5 kg, separados a uma distância de 0,5 m, é ___________.
II‐ O ___________________ é a região do espaço na qual é exercida uma força sobre um corpo, cuja natureza depende da causa que origina essa força ou interação.
Sabendo que o fio está inserido em um campo magnético (B) perpendicular e uniforme de 0,5 T, pode‐se concluir, corretamente, que após a corrente elétrica começar a circular pelo fio condutor, a força magnética Fm estará dirigida verticalmente para _______ e a mola sofrerá uma deformação igual a ______ cm.
I‐ As ondas mecânicas podem propagar‐se em diferentes meios materiais, inclusive no vácuo, sendo ondas bidimensionais.
II‐ As ondas mecânicas podem ser transversais e longitudinais dependendo da direção de vibração em relação à direção de propagação da onda.
III‐ As ondas eletromagnéticas não necessitam de um meio material para se propagarem.
IV‐ As ondas unidimensionais são aquelas que se propagam em um plano, como as ondas na superfície de um lago.
Está correto o que se afirma em
A figura a seguir ilustra as transformações sofridas por um gás ideal contido em um recipiente fechado com um pistão móvel. A partir da figura, avalie as afirmações abaixo e coloque V para verdadeiro ou F para falso. Em seguida assinale a alternativa com a sequência correta.
( ) O trabalho realizado pelo gás é de 3.105 J.
( ) A transformação BC se deu a volume constante, portanto é uma transformação isocórica.
( ) A quantidade de calor trocado no ciclo é igual a zero, pois temos uma transformação cíclica.
( ) O trabalho realizado sobre o gás é de 0,9.105 J.
( ) A corrente alternada (CA) é um fluxo oscilante de cargas elétricas que ora se movimenta em um sentido, ora em outro. Esse tipo de corrente é produzido por baterias e hidroelétricas. O sentido da corrente alternada real é dado pelo sentido do fluxo dos portadores das cargas positivas.
( ) O fenômeno de emissão de luz que ocorre quando uma corrente elétrica passa através de um gás rarefeito é conhecido como efeito térmico.
( ) Para medir a tensão aplicada aos terminais de um resistor, um voltímetro deve ser inserido a este de forma paralela. Além disso, para não influenciar no circuito medido, o voltímetro deve possuir a maior resistência interna possível, fazendo com que a corrente que o atravessa seja insignificante.
Read the text and answer the question
One man in a boat
L.G. Alexander
Fishing is my favourite sport. I often fish for hours without catching anything. But this does not worry me. Some fishermen are unlucky. Instead of catching fish, they catch old boots and rubbish. I am even less lucky. I never catch anything ‐ not even old boots. After having spent whole mornings on the river, I always go home with an empty bag. “You must give up fishing!” my friends say. “It’s a waste of time.” But they don’t realize one important thing. I’m not really interested in fishing. I am only interested in sitting in a boat and doing nothing at all!
PRACTICE AND PROGRESS ‐ An Integrated Course for Pre‐Intermediate Students, L.G Alexander, Longman Group Limited, London.
Read the text and answer the question
One man in a boat
L.G. Alexander
Fishing is my favourite sport. I often fish for hours without catching anything. But this does not worry me. Some fishermen are unlucky. Instead of catching fish, they catch old boots and rubbish. I am even less lucky. I never catch anything ‐ not even old boots. After having spent whole mornings on the river, I always go home with an empty bag. “You must give up fishing!” my friends say. “It’s a waste of time.” But they don’t realize one important thing. I’m not really interested in fishing. I am only interested in sitting in a boat and doing nothing at all!
PRACTICE AND PROGRESS ‐ An Integrated Course for Pre‐Intermediate Students, L.G Alexander, Longman Group Limited, London.
( ) The fisherman is often fishing, but he only catches old boots and rubbish.
( ) His friends support him to keep trying fishing.
( ) Fishing is only an excuse to stay sitting in boat doing nothing.
( ) He always goes home without any fish, old boot or rubbish inside his bag
Read the text and answer the question
One man in a boat
L.G. Alexander
Fishing is my favourite sport. I often fish for hours without catching anything. But this does not worry me. Some fishermen are unlucky. Instead of catching fish, they catch old boots and rubbish. I am even less lucky. I never catch anything ‐ not even old boots. After having spent whole mornings on the river, I always go home with an empty bag. “You must give up fishing!” my friends say. “It’s a waste of time.” But they don’t realize one important thing. I’m not really interested in fishing. I am only interested in sitting in a boat and doing nothing at all!
PRACTICE AND PROGRESS ‐ An Integrated Course for Pre‐Intermediate Students, L.G Alexander, Longman Group Limited, London.
Read the text and answer the question
One man in a boat
L.G. Alexander
Fishing is my favourite sport. I often fish for hours without catching anything. But this does not worry me. Some fishermen are unlucky. Instead of catching fish, they catch old boots and rubbish. I am even less lucky. I never catch anything ‐ not even old boots. After having spent whole mornings on the river, I always go home with an empty bag. “You must give up fishing!” my friends say. “It’s a waste of time.” But they don’t realize one important thing. I’m not really interested in fishing. I am only interested in sitting in a boat and doing nothing at all!
PRACTICE AND PROGRESS ‐ An Integrated Course for Pre‐Intermediate Students, L.G Alexander, Longman Group Limited, London.
Read the text and answer the question
One man in a boat
L.G. Alexander
Fishing is my favourite sport. I often fish for hours without catching anything. But this does not worry me. Some fishermen are unlucky. Instead of catching fish, they catch old boots and rubbish. I am even less lucky. I never catch anything ‐ not even old boots. After having spent whole mornings on the river, I always go home with an empty bag. “You must give up fishing!” my friends say. “It’s a waste of time.” But they don’t realize one important thing. I’m not really interested in fishing. I am only interested in sitting in a boat and doing nothing at all!
PRACTICE AND PROGRESS ‐ An Integrated Course for Pre‐Intermediate Students, L.G Alexander, Longman Group Limited, London.
Read the text and answer the question
One man in a boat
L.G. Alexander
Fishing is my favourite sport. I often fish for hours without catching anything. But this does not worry me. Some fishermen are unlucky. Instead of catching fish, they catch old boots and rubbish. I am even less lucky. I never catch anything ‐ not even old boots. After having spent whole mornings on the river, I always go home with an empty bag. “You must give up fishing!” my friends say. “It’s a waste of time.” But they don’t realize one important thing. I’m not really interested in fishing. I am only interested in sitting in a boat and doing nothing at all!
PRACTICE AND PROGRESS ‐ An Integrated Course for Pre‐Intermediate Students, L.G Alexander, Longman Group Limited, London.
Read the text and answer the question
One man in a boat
L.G. Alexander
Fishing is my favourite sport. I often fish for hours without catching anything. But this does not worry me. Some fishermen are unlucky. Instead of catching fish, they catch old boots and rubbish. I am even less lucky. I never catch anything ‐ not even old boots. After having spent whole mornings on the river, I always go home with an empty bag. “You must give up fishing!” my friends say. “It’s a waste of time.” But they don’t realize one important thing. I’m not really interested in fishing. I am only interested in sitting in a boat and doing nothing at all!
PRACTICE AND PROGRESS ‐ An Integrated Course for Pre‐Intermediate Students, L.G Alexander, Longman Group Limited, London.
Read the text and answer the question.
What is a friend?
Márcio Paulo Barbosa Pena Mascarenhas
Laurie: To me, a friend is someone who stands by you when you need them, someone who cares. Not like your parents, ________. Parents are either picking on you or telling you off, so sometimes it’s a pain. To a friend you can always open up.
Angela: I agree with Laurie but personally, I don’t think a friend has to be physically around all the time. I have friends that I haven’t seen in years, but I know if we get together, we’ll pick up right where we left off.
Fran: I think a friend is that old pal you’ve always gotten on with. I often look back on my schooldays and I think of the funny things my friends and I did together. As I see it, the friends you make in youth are friends to keep for a lifetime.
Gary: If you ask me, a friend is a person you have fun and relax with. My friends and I talk about movies, sports or politics. I don’t go round telling them my troubles and I don’t particularly want to hear theirs. I believe that if you don’t expect too much from people, you won’t be let down.
Grade 1, Student’s book, Belo Horizonte, 14th edition.
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