subject
Physics, 21.10.2020 21:01 zstarr

Sobre o campo elétrico assinale a alternativa correta: a) Quadruplicando-se a distância entre duas cargas elétricas, a força de atração ou repulsão entre elas ficará reduzida de 1/20.

b) A intensidade do campo elétrico criado por uma carga pontual Q de 28,0 µC, em um ponto A situado a 6,0 cm dessa carga é igual a 2 x 107 N/C (K = 9 x 109 N. m2/C2).
O campo elétrico é uma propriedade específica da carga elétrica.

c) O campo elétrico gerado por uma carga elétrica positiva é de aproximação e o de uma carga negativa de afastamento.

d) O campo elétrico resultante em um determinado ponto, produzido por várias cargas é igual à soma algébrica dos campos gerados por cada carga individual.

(Com justificativa, por favor)

ansver
Answers: 2

Another question on Physics

question
Physics, 22.06.2019 05:00
In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.
Answers: 1
question
Physics, 22.06.2019 05:50
High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.
Answers: 3
question
Physics, 22.06.2019 15:30
What are the necessary conditions for fusion?
Answers: 1
question
Physics, 22.06.2019 16:30
In the nineteenth century, gregor mendel first determined some basic rules of genetics that have been observed throughout all types of life. no observations have disproved these basic rules of genetics. charles darwin developed the idea of biological evolution around the same time, but he was unaware of mendel’s discoveries in genetics. over a century later, darwin’s idea of evolution was modified in order to incorporate mendel’s rules of genetics along with the other evidence that darwin had used. what is most likely the relationship between mendel’s rules of genetics and darwin’s idea of biological evolution? a.)mendel’s genetics states laws that are now part of the theory of biological evolution.b.)biological evolution states laws that are part of mendel’s theory of genetics.c.)mendel’s genetics replaced darwin’s entire concept of biological evolution.d.)biological evolution is a law that explains why all genetics exist.
Answers: 1
You know the right answer?
Sobre o campo elétrico assinale a alternativa correta: a) Quadruplicando-se a distância entre duas...
Questions
question
Mathematics, 25.08.2021 21:40
Questions on the website: 13722360