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Nikitich [7]
2 years ago
9

Why are stars given an absolute magnitude?

Physics
1 answer:
mafiozo [28]2 years ago
4 0

Answer:

The solution was to implement an absolute magnitude scale to provide a reference between stars. To do so, astronomers calculate the brightness of stars as they would appear if it were 32.6 light-years, or 10 parsecs from Earth.

Explanation:

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Okno okrętu podwodnego ma powierzchnię 0,3 m2 i znajduje się na głębokości, na której ciśnienie wywierane przez słup wody wynosi
OLEGan [10]

Answer:

The value of the water pressure force on the window is 150,000 N.

Wartość siły nacisku wody na okno wynosi 150000 N.

Explanation:

English Translation

The submarine window has an area of ​​0.3 m2 and is located at a depth at which the pressure exerted by the water column is 500 kPa. Finish the sentence. The value of the water pressure force on the window is.

Solution.

Pressure exerted by a force on a surface area perpendicular to the line of action of that force is given by the formula

P = (F/A)

where F = applied force, in this case, water pressure force on the window = ?

A = Area upon which the force is acting = Area of the window = 0.3 m²

P = 500 kPa = 500,000 Pa

500,000 = (F/0.3)

F = 500,000 × 0.3 = 150,000 N

In Polish/Po Polsku

Ciśnienie wywierane przez siłę na pole powierzchni prostopadłe do linii działania tej siły jest określone wzorem

P = (F / A)

gdzie F = przyłożona siła, w tym przypadku siła nacisku wody na okno =?

A = Obszar, na który działa siła = Powierzchnia okna = 0,3 m²

P = 500 kPa = 500000 Pa

500,000 = (F/0.3)

F = 500,000 × 0.3 = 150,000 N

Hope this Helps!!!

Mam nadzieję że to pomoże!!!

4 0
4 years ago
In old western movies, cowboys often would put their ear to a train track to listen for an oncoming train. What benefit would th
SVEN [57.7K]

Answer:

Because the sound travels faster in solids

Explanation:

Sound waves are mechanical waves, produced by the oscillations of the particles in a medium. The particles vibrate back and forth along the direction of propagation of the wave (longitudinal waves).

The speed of a sound wave depends on several factors, such as the density of the medium. In particular, the higher the density, the higher the speed of the wave, because in denser mediums the particles are more close to each other, so the transmission of the wave is more efficient since it can be transmitted better through the colliding particles.

For this reason, a sound wave travels faster in solids, and slower in gases.

Therefore in this problem, the sound of the oncoming train travels faster through the rail track (which consists of solids), rather than the air (which is a gas), so by putting the ear next to the track, it is possible to hear the sound of the train coming before the sound is heard in air.

6 0
3 years ago
Which of the following BEST explains how climate is related to the seasons?
AVprozaik [17]

Seasons are largely due to factors surrounding the Earth's tilted axis as it revolves around the sun. A season is a period of the year that is distinguished by special climate conditions.

8 0
3 years ago
Read 2 more answers
Is a parked car potential or kinetic ?
kirill115 [55]

Answer:

Potential energy is the energy that is stored in an object. ... When you park your car at the top of a hill, your car has potential energy because the gravity is pulling your car to move downward; if your car's parking brake fails, your vehicle may roll down the hill because of the force of gravity.

3 0
3 years ago
What is the difference between a mechanical wave and an electromagnetic wave? A mechanical wave travels through empty space, whi
sertanlavr [38]

Answer: The correct answer is "A mechanical wave travels through matter, while an electromagnetic wave travels through empty space".

Explanation:

The difference between a mechanical wave and an electromagnetic wave are as follows:

Electromagnetic waves are produced by the vibrations of the charged particles while the mechanical waves are caused by the wave amplitude.

Electromagnetic wave does not need medium while the mechanical wave need medium to travel. Mechanical wave can travel in solid, liquid and gas. Electromagnetic wave travels in vacuum.

Therefore, a mechanical wave travels through matter, while an electromagnetic wave travels through empty space.

7 0
4 years ago
Read 2 more answers
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