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3 years ago

Resistance independent to : a. Shape b. Size c. Physical state d. None

Physics

2 answers:

lesantik [10]3 years ago

7 0

Answer:

d.none

Explanation:

because shape size and physical actually do are dependant

yan [13]3 years ago

7 0

Answer:

Explanation:

Resistance is given by

R = pL/A

Where A is length of wire , A is Area and p is resistivity of the material

From the expression above,

Resistance is affected by length and Area which means in consonance it's affected by the shape because shape affects the length and surface Area and Offcourse the size; the larger the surface area the Lower the resistance and the smaller the length and conversely the smaller the surface area and longer the length.

The physical state refers to the temperature of the substance. The higher the temperature the more electrons are free to move around and the lower the resistance.

Hence none of the option to a-c apply.

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Answer:

$28.0\; {\rm N}$ to the right.

Explanation:

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The question states that the $x$ -component of the force from the first wire is $28.0\; {\rm N}$ to the left. Thus, for the net force in the $x$ -direction to be $0\; {\rm N}$ , the force from the other wire in the $x\!$ -component needs to be $28.0\; {\rm N}\!$ to the right (same magnitude but opposite direction.)

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2 years ago

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Answer:

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3 years ago

Mercury's surface has many craters because _____.

Alexeev081 [22]

I think it would be that it has no atmosphere

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3 years ago

A 5.22×104 kg railroad car moves on frictionless horizontal rails until it hits a horizontal spring stopper with a force constan

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To solve this problem we will apply the principles of conservation of energy, for which we have to preserve the initial kinetic energy as elastic potential energy at the end of the movement. If said equality is maintained then we can affirm that,

$\text{Initial Energy}=\text{Final Energy}$

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Here,

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Rearranging to find the velocity,

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Replacing our values we have,

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4 years ago

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solmaris [256]

Answer:

The kinetic energy will have an increase as it falls.

Explanation:

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3 years ago