PHYSICS HIGH SCHOOL

What happens to the magnetic domains in a material when the material is placed in a strong magnetic field? Please help and thank you!

Answers

Answer 1
Answer: if it is diamagnetic then it magnetise opposite to magnetic field
if paramagnetic it weekly magnetise in direction of magnetic field
if ferromagnetic it strongly magnetise in direction of magnetic field

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The sun is the ultimate source for energy on the Earth.a. Trueb. False

Which of these is NOT an event that helped make the Moon as it is today?a. Iron sank into Earth's core.
b. Plate tectonics caused lava to flow.
c. Earth and a planetesimal collided.
d. The lunar surface melted and was bombarded by meteoroids

Answers

The correct answer to the question that is stated above is letter b, Plate tectonics caused lava to flow. All of the options are mentioned in the theories of the formation of the moon except for letter B.

There are 5 serious  theories about the formation of the moon,these are:
The Fission Theory--
The Capture Theory--
The Condensation Theory--
The Colliding Planetesimals Theory--
The Ejected Ring Theory--

See attached file for the description of each theory.

In the Balmer series, how many spectral lines have the wavelength greater than 400 nm?

Answers


The Balmer series or Balmer lines in atomic physics, is the designation of one of a set of six named series describing the spectral line emissions of the hydrogen atom. The Balmer series is calculated using the Balmer formula, an empirical equation discovered by Johann Balmer in 1885. this is all I know sorry

Who was the powerful and ruthless leader of the soviet union from 1929-1953 who also ordered the great purge in which he had his real and imagined enemies arrested?

Answers

Answer:

The correct answer is Joseph Stalin.

Explanation:

Joseph Vissarionovich Stalin was a Soviet politician who led the soviet union from 1929 - 1953. Stalin self declared himself as the dictator by 1930s. He was the person behind the Great Purge or "Great Terror" in which around a million were imprisoned and some 750,000 were executed. This campaign was led just to execute all those who were a threat to his party.

A student throws a rock horizontally from the edge of a cliff that is 20 m high. The rock has an initial speed of 10 m/s. If air resistance is negligible, the distance from the base of the cliff to where the rock hits the level ground below the cliff is most nearlya.5m
b.10m
c.20m
d.40m
e.200m

Answers

Answer:

c.20

Explanation:

Part 1. A girl leaves a history classroom and walks 10 meters north to a drinking fountain. Then she turns and walks 30 meters south to an art classroom. What is the girl's total distance traveled? Part 2. Using the information above from Part 1. What is the girl's total displacement from the history classroom to the art classroom?

Answers

The total distance traveled by the girl will be 40 meters and the displacement will be 30 meters.

What will be the distance and displacement of the girl?

Distance = total amount of path followed by any body called distance.

Displacement= The minimum distance between two points irrespective to the path followed by the body is displacement.

It is given that

Distance traveled to north direction = 10 metres

Distance traveled to south direction= 30 metres

So the path followed by the girl in total = North direction + south direction

                                                                 = 10+30

                                                                 = 40 meters

And the displacement  = min distance between History class and fountain

                                      = 30 meters

total distance traveled by the girl will be 40 meters and the displacement will be 30 meters.

To learn more about Distance and Displacement follow

brainly.com/question/127432
She walks/travels 40 meters. Her displacement is 20 metres because she walked 10m, back those same 10m and the 20m to the art classroom.

an electron in a mercury atom changes from energy level b to a higher energy level when the atom absorbs a single photon with an energy of 3.06eV. Determine the energy of the photon, in joules.

Answers

Hi There! :)

An electron in a mercury atom changes from energy level b to a higher energy level when the atom absorbs a single photon with an energy of 3.06eV.Determine the energy of the photon, in joules.

kg=15000J
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