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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>

<u>The material should be conductor insulated by insulator</u>

<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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The electron gun in an old TV picture tube accelerates electrons between two parallel plates 1.4cm apart with a 28kV potential d

yulyashka [42]

Answer:

a) F = 3.2 10⁻¹⁰ N , b) v = 9.9 10⁷ m / s

Explanation:

a) The electric force is

F = q E

The electric field is related to the potential reference

V = E d

E = V / d

Let's replace

F = e V / d

Let's calculate

F = 1.6 10⁻¹⁹ 28 10³ / 1.4 10⁻²

F = 3.2 10⁻¹⁰ N

b) For this part we can use kinematics

v² = v₀ + 2 a d

v = √ 2 ad

Acceleration can be found with Newton's second law

e V / d = m a

a = e / m V / d

a = 1.6 10⁻¹⁹ / 9.1 10⁻³¹ 28 10³ / 1.4 10⁻²

a = 3,516 10⁻¹⁷ m / s²

Let's calculate the speed

v = √ (2 3,516 10¹⁷ 1.4 10⁻²)

v = √ (98,448 10¹⁴)

v = 9.9 10⁷ m / s

3 0

3 years ago

A contact force exists between two interacting objects that physically contact each other. a non-contact force exists when two i

Murrr4er [49]

True.

A contact force is a force between two objects that are physically in contact with each other: an example of a contact force is the normal reaction of a table supporting a book.

A non-contact force is a force between two objects that are not physically in contact with each other: an example of non-contact force is the gravitational attraction between the Earth and the Moon.

4 0

3 years ago

Read 2 more answers

A 432 g sample of 60/27Co has a decay constant of 4.14 x 10-9 s-1. How long will it take before only 1/3 of the original sample

Musya8 [376]

Answer:

remain 1s60

Explanation:

I took away sample

7 0

3 years ago

Convert 55 miles into inches