You can find electric power lines under the ground by looking for magnetic fields at ground level. This is best explained by which of these statements?A) All wires have magnetic materials in them.
B) An electric current in a wire produces a magnetic field.
C) The power company puts magnets to help find the power lines.
D) The iron in the ground is disturbed by the power lines creating magnetic fields

Answers

Answer 1

Answer: Answer: B) An electric current in a wire produces a magnetic field.

All movement of electrons in a wire (current) creates a magnetic field.

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You kick a ball with a speed of 18 m/s at an angle of 32 degrees. How far does the hall land?

Answers

You kick a ball with a speed of 18 m/s at an angle of 32 degrees. How far away does the ball land?
d = V^2/g*sin(32*2) = 18^2/9.8*0.90 = 29.72 m

Answer:

29.7m

Explanatio

it is said that a fool and his money ate soon parted.Suppose we place the fool and gold brick in the middle of a frictionless,frozen lake (Galileo's ideal frozen lake).How can the fool rescue himself?Is he still a fool?

Answers

He could theoretically push the gold brick away from himself, and due to Newton's 3rd law (Every action has an equal and opposite reaction), the same amount of force would recoil back at him from the gold brick. As a result, he will move in the opposite direction from the gold brick, and since it as an ideal frozen lake (meaning there is no friction present), he will keep going until he reaches the edge of the lake.

And I don't know if he's still a fool. That's up to you.

A 25.0-meter length of platinum wire with a cross-sectional area of 3.50 × 10^−6 meter^2 has a resistanceof 0.757 ohm at 20°C. Calculate the resistivity of the wire. [Show all work, including the equation and
substitution with units.]

Answers

The resistivity of the plantinum wire is 1.06 × 10⁻⁷Ωm

Calculating Resistivity

From the question,

We are to determine the resistivity of the wire

Resistivity can be calculated from the formula

$\rho = (RA)/(l)$

Where $\rho$ is the resistivity of the wire

R is the resistance

A is the cross-sectional area

and $l$ is the length of the wire

From the given information,

R = 0.757 ohm (Ω)

A = 3.50 × 10⁻⁶ m²

$l$ = 25.0 m

Putting the parameters into the formula, we get

$\rho = (0.757 * 3.50 * 10^(-6) )/(25)$

$\rho = 0.10598 * 10^(-6)$

$\rho = 1.0598 * 10^(-7)$

$\rho \approx 1.06 * 10^(-7) \ \Omega m$

Hence, the resistivity of the plantinum wire is 1.06 × 10⁻⁷Ωm

Learn more on Calculating Resistivity here: brainly.com/question/5595373

R= (rou * L) / area
where R is the wire resistance
rou: resistivity of the wire material
L : wire length
A : cross section area of wire
by sub.
0.757= (rou*25)/ 3.5*10^-6
25*rou = 2.6495*10^-6
rou= 1.0598*10^-7 ohm.m

What can be found in every skeletal muscle?

Answers

You can find muscle fibers, nerves, connective tissue, and blood vessels in every skeletal system. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

Answer:

D. tendons, nerves, blood vessels, and bones

Explanation:

You are standing in a cave and yell out the word "hello," and are then able to hear it echoed back to you. What wave property is this describing?

Answers

Answer:

Diffraction

Explanation:

Diffraction because the sound waves are spreading out and traveling around the walls of the cave.

Which of the following occurs when light is reflected from a rough or unpolished surface? A. The original pattern of the light is distorted.
B. The original pattern of the light is preserved.
C. The angle of reflection is less than the angle of incidence.
D. The angle of reflection is greater than the angle of incidence.

Answers

So we want to know what does occur when light is refracted from a rough and unpolished surface. The correct answer is A. the original pattern of the light is distorted because rough and unpolished surfaces dissipate light in all directions so we cant get a clear image.

The correct answer is A

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Eric traveled east for 150 miles in 2 hours. Then he went west for 40 miles in 1 hour. What is the average velocity?