Foram encontradas 40 questões.
A resistência elétrica de um circuito pode ter seu valor duplicado de 100 Ω para 200 Ω ao ser trocada a posição de uma chave Ch, como mostra a figura.
Ao longo de 6 s, a chave foi reposicionada de acordo com o gráfico:
Sabendo que o resistor está associado aos terminais de uma bateria de tensão constante e igual a 40 V, a energia por ele dissipada durante o tempo de 6 s foi de
Provas
Em um experimento na sala de aula, um professor deseja projetar, sobre uma parede, a imagem ampliada de uma vela. Para isso, o docente utiliza um espelho esférico côncavo de distância focal 1,0 m. Se a vela for colocada a 1,2 m da superfície refletora do espelho, a distância que a superfície refletora do espelho deve ficar em relação à parede para se obter a imagem nítida dessa vela é de
Provas
Três líquidos não miscíveis, A, B e C, são colocados no interior de um sistema de vasos comunicantes, assumindo a condição estática mostrada na figura.
A superfície de separação entre os líquidos A e B e a superfície de separação entre os líquidos B e C estão no mesmo nível. Sabendo que o líquido B é água, cuja densidade é 1,0 × 103 kg/m3, as densidades dos líquidos A e C são, respectivamente,
Provas
A amarração da carga de uma picape estava frouxa e, por isso, após a passagem desse veículo sobre um buraco, uma das caixas que eram transportadas caiu sobre o piso horizontal da rodovia. A caixa, com velocidade inicial de 72 km/h, escorregou até parar seu movimento devido à ação das forças dissipativas causadas pelo atrito com o piso da rodovia e pelo ar. Sabendo que a massa da caixa era de 40 kg, o valor absoluto da energia dissipada até a perda total de movimento da caixa foi de
Provas
Seguindo pela mesma estrada e para o mesmo sentido, dois caminhoneiros de uma mesma empresa transportadora se comunicam pelo rádio para avaliarem se irão se encontrar pelo caminho. No instante em que os caminhoneiros conversavam, o caminhão mais carregado passava pelo marco quilométrico 160 km da estrada movendo-se a 80 km/h, enquanto o outro caminhão, sem carga, passava pelo marco quilométrico 120 km, movendo-se a 100 km/h. Se as velocidades dos caminhões não mudarem, os caminhoneiros irão se encontrar passado o tempo de
Provas
Read the excerpt from the song “Love is still the answer” by Jason Mraz.
The question is why, why are we here?
To say our hello’s and goodbye’s and then disappear
This beautiful life, what is it for?
To learn how to master peace or master war
There’s only one answer that matters
Whatever you want, whatever you are after
Love is still the answer
Love is still the answer
(www.azlyrics.com)
In the line “Even if your heart has been shattered”, the underlined expression indicates the idea of
Provas
Leia o texto para responder à questão
British scientists say they have developed a test which can help identify women with an abnormal womb lining
In some women with a history of miscarriage, the womb lining doesn’t react the way it should — transforming into a supportive place for the embryo to implant, the University of Warwick team discovered. Around one in six of all pregnancies are lost, most before twelve weeks, and each miscarriage increases the risk of another one happening.
To date, most research in this area has focused on the quality of the embryo, with much less known about the role of the womb lining. Dr Jo Muter, study author and researcher at Warwick Medical School in the United Kingdom, said: “Many women are told they’ve just had ‘bad luck’, but our findings show that the womb
They’ve developed a new test which can measure signs of a healthy or defective reaction in the womb lining, which is being piloted to help more than 1,000 patients in the UK at the University Hospital Coventry & Warwickshire (UHCW).
No trecho do quarto parágrafo “The job of the womb lining is to receive the embryo and help it develop during pregnancy, thanks to a reaction which converts cells into a different, supportive state”, o termo sublinhado refere-se a
Provas
Leia o texto para responder à questão
British scientists say they have developed a test which can help identify women with an abnormal womb lining
In some women with a history of miscarriage, the womb lining doesn’t react the way it should — transforming into a supportive place for the embryo to implant, the University of Warwick team discovered. Around one in six of all pregnancies are lost, most before twelve weeks, and each miscarriage increases the risk of another one happening.
To date, most research in this area has focused on the quality of the embryo, with much less known about the role of the womb lining. Dr Jo Muter, study author and researcher at Warwick Medical School in the United Kingdom, said: “Many women are told they’ve just had ‘bad luck’, but our findings show that the womb
The job of the womb lining is to receive the embryo and help it develop during pregnancy, thanks to a reaction which converts cells into a different, supportive state. But when that reaction is messed up and doesn’t fully happen, the risk of bleeding and early pregnancy loss rises. Once a woman has had one defective reaction, she is more likely to have another, the researchers say.
They’ve developed a new test which can measure signs of a healthy or defective reaction in the womb lining, which is being piloted to help more than 1,000 patients in the UK at the University Hospital Coventry & Warwickshire (UHCW).
In the excerpt from the first paragraph, “for those going through repeated pregnancy loss”, the underlined expression can be replaced, without change of meaning, by
Provas
Leia o texto para responder à questão
British scientists say they have developed a test which can help identify women with an abnormal womb lining
In some women with a history of miscarriage, the womb lining doesn’t react the way it should — transforming into a supportive place for the embryo to implant, the University of Warwick team discovered. Around one in six of all pregnancies are lost, most before twelve weeks, and each miscarriage increases the risk of another one happening.
To date, most research in this area has focused on the quality of the embryo, with much less known about the role of the womb lining. Dr Jo Muter, study author and researcher at Warwick Medical School in the United Kingdom, said: “Many women are told they’ve just had ‘bad luck’, but our findings show that the womb
The job of the womb lining is to receive the embryo and help it develop during pregnancy, thanks to a reaction which converts cells into a different, supportive state. But when that reaction is messed up and doesn’t fully happen, the risk of bleeding and early pregnancy loss rises. Once a woman has had one defective reaction, she is more likely to have another, the researchers say.
They’ve developed a new test which can measure signs of a healthy or defective reaction in the womb lining, which is being piloted to help more than 1,000 patients in the UK at the University Hospital Coventry & Warwickshire (UHCW).
De acordo com a afirmação da Dra Jo Muter, no terceiro parágrafo,
Provas
Leia o texto para responder à questão
British scientists say they have developed a test which can help identify women with an abnormal womb lining
In some women with a history of miscarriage, the womb lining doesn’t react the way it should — transforming into a supportive place for the embryo to implant, the University of Warwick team discovered. Around one in six of all pregnancies are lost, most before twelve weeks, and each miscarriage increases the risk of another one happening.
To date, most research in this area has focused on the quality of the embryo, with much less known about the role of the womb lining. Dr Jo Muter, study author and researcher at Warwick Medical School in the United Kingdom, said: “Many women are told they’ve just had ‘bad luck’, but our findings show that the womb
The job of the womb lining is to receive the embryo and help it develop during pregnancy, thanks to a reaction which converts cells into a different, supportive state. But when that reaction is messed up and doesn’t fully happen, the risk of bleeding and early pregnancy loss rises. Once a woman has had one defective reaction, she is more likely to have another, the researchers say.
They’ve developed a new test which can measure signs of a healthy or defective reaction in the womb lining, which is being piloted to help more than 1,000 patients in the UK at the University Hospital Coventry & Warwickshire (UHCW).
The new test developed by British scientists is able to
Provas
Caderno Container