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3 years ago

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5. A group of at

1 answer:

Sveta_85 [38]3 years ago

4 0

Answer:

A group of atoms where the magnetic fields of the atoms point in the same direction is a magnetic domain.

Explanation:

In every magnet's magnetic field there is a region where the magnetization is in the same direction. This region is known as magnetic domain.
In the magnetic domain the atoms always points in the same magnetic filed direction.
All the atom's magnetic field align in one particular direction.
This region where atoms align is called as domains.

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An atom an atomic number of 12 and a mass number of 25 can be best described as

katen-ka-za [31]

Neutral Magnesium atom

Explanation:

From the given description of the atom, one can infer that this atom is a neutral atom.

In a neutral atom, the number of protons and neutrons are the same.

Atomic number = 12

Mass number = 25

This atom is Magnesium.

Magnesium has an atomic number of 12 from the periodic table.

Number of protons = 12 = atomic number

Number of electrons = 12(for neutral atoms, atomic number is same as number of electrons).

Number of neutrons = mass number - atomic number = 25-12 = 13.

Learn more:

Atomic number brainly.com/question/5425825

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3 years ago

What do astronomers mean when they say that we are all star stuff?.

tekilochka [14]

Answer:

low-mass star.

Explanation:

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3 years ago

Read 2 more answers

3. Two spherical objects at the same altitude move with identical velocities and experience the same drag force at a time t. If

Daniel [21]

Answer:

Object 2 has the larger drag coefficient

Explanation:

The drag force, D, is given by the equation:

$D = 0.5 c \rho A v^2$

Object 1 has twice the diameter of object 2.

If $d_2 = d$

$d_1 = 2d$

Area of object 2, $A_2 = \frac{\pi d^2 }{4}$

Area of object 1:

$A_1 = \frac{\pi (2d)^2 }{4}\\A_1 = \pi d^2$

Since all other parameters are still the same except the drag coefficient:

For object 1:

$D = 0.5 c_1 \rho A_1 v^2\\D = 0.5 c_1 \rho (\pi d^2) v^2$

For object 2:

$D = 0.5 c_2 \rho A_2 v^2\\D = 0.5 c_2 \rho (\pi d^2/4) v^2$

Since the drag force for the two objects are the same:

$0.5 c_1 \rho (\pi d^2) v^2 = 0.5 c_2 \rho (\pi d^2/4) v^2\\4c_1 = c_2$

Obviously from the equation above, c₂ is larger than c₁, this means that object 2 has the larger drag coefficient

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3 years ago

A car travels north for 20 km. The car then travels south for 35 km.

PSYCHO15rus [73]

Answer: -15 km

Explanation:

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3 years ago

Janet recently read an article about the role that the brain plays in processing emotions. Janet comes over to your house for di

Ira Lisetskai [31]

Amygdala helps in processing emotions
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3 years ago