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madam [21]
3 years ago
8

What is the effect on current if both the voltage and the resistance are halved?

Physics
1 answer:
bulgar [2K]3 years ago
3 0

The current through a resistor is

      <u> (voltage across the resistor) / (resistance of the resistor)</u> .

If the numerator and the denominator of that fraction are both
multiplied or divided by the same number, then the value of the
fraction <em>doesn't change</em>.


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Explanation:

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3 years ago
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svlad2 [7]
Burning of paper is the answer
6 0
3 years ago
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Que fuerza será necesaria aplicar a un cuerpo de 20kg de masa para imprimirle una aceleración a=4m/s²
WARRIOR [948]

Answer:

La fuerza que será necesaria aplicar a un cuerpo de 20kg de masa para imprimirle una aceleración a=4m/s² es 80 N.

Explanation:

La segunda ley de Newton, llamada ley fundamental o principio fundamental de la dinámica, plantea que un cuerpo se acelera si se le aplica una fuerza.

De esta manera, esta ley establece que las aceleraciones que experimenta un cuerpo son proporcionales a las fuerzas que recibe. Dicho de otra forma, la aceleración de un cuerpo es proporcional a la fuerza neta que se le aplica. Cuanto mayor es la fuerza que se le aplica a  un objeto con una masa dada, mayor será su aceleración.

La segunda Ley de Newton se expresa matemáticamente como:

F = m*a

Donde:

  • F es la fuerza neta. Se expresa en Newton (N)
  • m es la masa del cuerpo. Se expresa en kilogramos (Kg.).
  • a es la aceleración que adquiere el cuerpo. Se expresa en metros sobre segundo al cuadrado (m/s²).

En este caso:

  • m= 20 kg
  • a= 4 m/s²

Reemplazando:

F= 20 kg* 4 m/s²

Resolviendo:

F= 80 N

<u><em>La fuerza que será necesaria aplicar a un cuerpo de 20kg de masa para imprimirle una aceleración a=4m/s² es 80 N.</em></u>

4 0
3 years ago
As you stand on a floor, the floor exerts an upward force on you. why are you not moved upward by this force? 1. the upward forc
dolphi86 [110]
Newton's third law of motion states that for any action, there is equal and opposite force. For a person standing on a floor, the action force is the weight and thus the floor must exert an opposite and equal reaction force equivalent in magnitude to the weight of the person.

In this regard, statement 3. is correct.
6 0
3 years ago
Two balls have the same mass, but one has a larger volume than the other. which ball has the larger density
Aliun [14]
Answer: the ball with the less volume.
To count density you need to divide the mass by the volume. That means larger mass will be more density, but larger volume means lower density. In this case, the ball has the same mass. So the one with less volume has more density.
5 0
3 years ago
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