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3 years ago

Why is an iron bolt attracted to a magnet?

Physics

2 answers:

icang [17]3 years ago

8 0

Answer:

A. When it is in a magnetic field, it becomes a temporary magnet.

Explanation:

An iron bolt is attracted to a magnet because when in a magnetic field, the iron becomes a temporary magnet.

This is because the iron aligns their electrons in the magnetic fields.

This causes that attraction between the magnet and the iron.
Metals like iron are said to be ferromagnetic
Unpaired electrons in iron spin in such a way that they align with the magnetic fields of the magnet.

PSYCHO15rus [73]3 years ago

3 0

Answer:

Explanation:

just took the test late but its right

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A Ferris wheel with a radius of 9.8 m rotates at a constant rate, completing one revolution every 37 s. Suppose the Ferris wheel

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3 years ago

A car is driving at 30 m/s it has a mass of 1800 kg what is the cars momentum?

Ostrovityanka [42]

Answer:

Explanation:

Momentum is a concept and is defined as,

Momentum = mass × velocity

So to calculate the momentum of the car

momentum of the car = mass of the car × velocity of the car

So we get,

momentum of the car = 1800 × 30

= 54000 Ns

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4 years ago

Read 2 more answers

What are the two factors affect the weight of an object?

makkiz [27]

Answer:

mass and distance

Explanation:

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4 0

3 years ago

Why is the mass of an atom's electrons not included in the atom's mass number?

Katen [24]

Answer: A: the electrons move so fast that their mass cannot be measured

Explanation: because they are so fast scientist and other people cannot measure them

8 0

3 years ago

An electron is accelerqated in the uniform field betwen two parallel charged oplates. The separation of the plates is 1.20 cm

marysya [2.9K]

Answer:

The speed of electron is $8.7\times10^{6}\ m/s$

Explanation:

Given that,

Separation of the plate = 1.20 cm

Suppose the field is $E=1.80\times10^{4}\ N/C$ .

If the electron is accelerated from rest near the negative plate and passes through a tiny hole in the positive plate.

What the speed does it leave the hole?

We need to calculate the acceleration

Using formula of electric force

$F = qE$

$ma=qE$

$a=\dfrac{qE}{m}$

We need to calculate the speed of electron

Using equation of motion

$v^2=u^2+2as$

$v^2=2as$

Put the value of acceleration in the formula

$v^2=2\times\dfrac{qE}{m}\times s$

Put the value into the formula

$v^2=2\times\dfrac{1.6\times10^{-19}\times1.80\times10^{4}\times1.20\times10^{-2}}{9.11\times10^{-31}}$

$v=\sqrt{2\times\dfrac{1.6\times10^{-19}\times1.80\times10^{4}\times1.20\times10^{-2}}{9.11\times10^{-31}}}$

$v=8.7\times10^{6}\ m/s$

Hence, The speed of electron is $8.7\times10^{6}\ m/s$

7 0

3 years ago