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4 years ago

Which best describes the materials that make up an electrical cord?

2 answers:

6 0

the answer to the question is a metallic conductor with free electrons surrounded by a rubber insulator lacking free electrons

ser-zykov [4K]4 years ago

4 0

<h2>Answer:</h2>

The material should be conductor insulated by insulator

<h2>Explanation:</h2>

An electrical cord is an electrical cable that temporarily connects an appliance to the mains electricity supply via a wall socket or extension cord. The most frequently used material for the conductor in an electrical cable is copper because it is the best conductor for the flow of electric current as it is abundant in free electrons. After that an insulator like rubber or plastic is placed between the two electrodes and then connected to an electrical socket.

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What immediate action should you take when operating a boat if you hear the fog signal of another boat you cannot see?

german

If you are operating a boat and you hear the fog signal of another boat you cannot see, you should immediately reverse the engine or even stop it if you can do that (for the safety of everyone).
Then, you should ask someone else to go to the bow and assist in looking (maybe he/she can see the other boat that you cannot see)

4 0

3 years ago

Read 2 more answers

What should a sailboat operator do when approaching a PWC head-on

nekit [7.7K]

In accordance with the International Regulation for the prevention of collisions at sea:

1.- A sailing boat has a passing preference over a motorized boat, except when the motor boat is limited by its draft.

2.- The sailboat must maintain its course and speed.

3.- If it is evident that the PWC does not respond, the sailboat must sound the warning signal, and change its course to starboard.

4.- All actions must be taken as soon as possible.

5.- If a sailboat is using its engine, the situation changes, and in that case, both ships must alter to starboard.

8 0

3 years ago

4. As a 500 N woman sits on the floor, the floor exerts a force on her of

monitta

Answer: 1000

Explanation:

Its double her weight

7 0

3 years ago

Suppose the electric field in some region is found to be E = kr3 ˆr, in spherical coordinates (k is some constant). (a) Find the

Assoli18 [71]

Answer:

Part a)

$\rho = 3\epsilon_0 k r^2$

Part b)

$Q = 4\pi \epsilon_0kR^5$

Explanation:

Part a)

As we know that electric field intensity due to some given charge distribution is given as

$E = kr^3 \hat r$

now electric flux through a spherical surface of radius r is given as

$\phi = E. A$

$\phi = kr^3(4\pi r^2)$

now by Guass law we know that

$E.A = \frac{q}{\epsilon_0}$

$q = 4\pi \epsilon_0kr^5$

now volume charge density is given as

$\rho = \frac{q}{\frac{4}{3}\pi r^3}$

$\rho = 3\epsilon_0 k r^2$

Part b)

Total charge inside the radius R is given as

$Q = 4\pi \epsilon_0kR^5$

7 0

3 years ago

A positive and a negative charge are released from rest in vacuum. They move toward each other. As they do: A positive and a neg

Pachacha [2.7K]

Answer:

A negative potential energy becomes more negative

Explanation:

Let the charges be - Q₁ and Q₂ . Let the distance between them be d .

Potential energy = k -Q₁x Q₂ / R

= - KQ₁ Q₂ / R

Now if the magnitude of R decreases , the magnitude of potential energy increases . So we see that the negative potential energy becomes more negative .

4 0

4 years ago