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2 years ago

A copper wire is stretched so that its length increases and its diameter decreases. what is the result?

Physics

1 answer:

Dovator [93]2 years ago

3 0

The result is although the wire's resistivity doesn't change, its resistance does.

Considering the formula for a material's resistance:

R=pL/A

R is directly proportional to L and inversely proportional to A, as can be seen. Be aware that "rho" is a material-specific and intensive attribute (meaning this value will not change if the material is only physically altered). Remember that A = This implies that the relationship between R and the square of r is inverse. When the wire is stretched, the impacts on length are less noticeable than the effects on r. Therefore the wire's resistance increases, but its resistivity stays the same.

Learn more about resistance here:

brainly.com/question/20708652

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The difference in particle size of the soil constituents determine its texture.

Schach [20]

Answer:Soil texture depends on the size of individual soil particles and is determined by the relative proportions of particle sizes that make up the soil. The texture affects the amount of water that can be absorbed for use by plants and animals.

Explanation:

3 0

3 years ago

___________ charges a neutral body by touching it with a charged body.

k0ka [10]

The correct answer would be cells

4 0

3 years ago

A physics professor uses an air-track cart of mass m to compress a spring of constant k by an amount x from its equilibrium leng

zhenek [66]

Answer:

v = √k/m x

Explanation:

We can solve this exercise using the energy conservation relationships

starting point. Fully compressed spring

Em₀ = $K_{e}$ = ½ k x²

final point. Cart after leaving the spring

$Em_{f}$ = K = ½ m v²

Em₀ = Em_{f}

½ k x² = ½ m v²

v = √k/m x

6 0

4 years ago

Juan is on a morning jog. His speed is represented in the graph. At what rate of speed is Juan running between 4min and 6min? Ac

Nesterboy [21]

Answer:

a) The speed of Juan is 250 m/min

b) In that interval, he's at rest

c) Juan would have needed 12 minutes to run 3000 m

Explanation:

Distance vs Time Graph Analysis

If time is on the horizontal axis, and the distance is in the vertical axis, then the slope of the graph represents the instantaneous speed of the moving object. The graph shows three different zones which reflect Juan's jogging at that morning.

a) The period between 4 and 6 minutes clearly shows Juan is moving in such a way the distance increases when time passes. The speed of the motion can be obtained by computing the slope of the line. We can locate the points (4,1000) and (6,1500). We compute the speed

$\displaystyle v=\frac{1500-1000}{6-4}=\frac{500}{2}=250 m/min$

The speed of Juan is 250 m/min

b) We can see between 7 and 11 minutes, Juan's distance is not changing because he stopped running. In that interval, he's at rest

c) We have already determined the speed on the first 7 minutes (the same as between 4 and 6 minutes). We know that

$\displaystyle v=\frac{x}{t}$

Where v is the speed, x is the distance, and t is the time

We need to know the time needed to travel x=3000 m at the initial speed v=250 m/min, so we solve the equation for t

$\displaystyle t=\frac{x}{v}$

$\displaystyle t=\frac{3000}{250}=12\ minutes$

Juan would have needed 12 minutes to run 3000 m

3 0

4 years ago

Why isn’t our constitution ( and our country) in a constant state of adjustment and readjustment

madam [21]

The constitution and the country aren't in a constant state of adjustment and readjustment because it has strong and logical ideological bases that encompass most of society's issues over time.

The constitution was written on a democratic ideological basis inspired by the European Enlightenment revolution of thought. These principles have contributed to the construction of American social logic.

Therefore, the constitution and the country have not needed major readjustments or adjustments since their creation because the country has been built on solid and well-defined ideological bases that are projected into the future with a social logic.

Learn more in: brainly.com/question/14453917

4 0

3 years ago