Physics, 04.10.2019 20:00 jackiecroce1

What quantities determine the resistance of a piece of material? choose all that apply. the voltage across the materialthe type of materialthe current flowing through the piece of materialthe cross-sectional area of the piece of materialthe length of the piece of material

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Answer;The type of materialThe cross-sectional area of the piece of materialThe length of the piece of materialExplanation;

The resistance is a measure of how the material impedes the flow of electrons through it. There are several factors that affect the resistance of a wire or a material.

The four main factors which affect the resistance of a material are;

The length of the wireThe thickness of the wireThe temperature of the wireThe type of material the wire is made of.

Answer from: Quest

She sold 135 peaches, because if you multiply 2.50 eith 135, you'd get 337.5, the 0 can be added or not.

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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What quantities determine the resistance of a piece of material? choose all that apply. the voltage...