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3 years ago

The Hertzsprung-Russel diagram is used to show the relationship between which two characteristics of stars?

Physics

2 answers:

yuradex [85]3 years ago

8 0

Answer:

Absolute Magnitude (Luminosity) and Spectral class (Temperature)

Explanation:

Hertzsprung-Russell diagram, popularly known as HR Diagram, shows the relation between the absolute magnitude (or Luminosity) and temperature of stars (spectral class). HR diagram helps in understanding the stellar evolution. One can predict the life-cycle of a star with the help of this plot. One can see, with the help of HR Diagram, that stars spend 90% of their life time in main sequence stage where the fusion of Hydrogen takes place in the core.

Ejnar Hertzsprung and Henry Norris Russell created this plot in 1910.

andre [41]3 years ago

3 0

The Hertzsprung- Russel diagram is used to how the relationship between the absolute magnitudes of stars and their effective temperatures.

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20-point physics question! :D

Virty [35]

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3 years ago

Read 2 more answers

Estimate the peak wavelength for radiation from ice at 273 k.

Andrews [41]

<h2>Answer: 10615 nm</h2>

Explanation:

This problem can be solved by the Wien's displacement law, which relates the wavelength $\lambda_{p}$ where the intensity of the radiation is maximum (also called peak wavelength) with the temperature $T$ of the black body.

In other words:

<em>There is an inverse relationship between the wavelength at which the emission peak of a blackbody occurs and its temperature.</em>

Being this expresed as:

$\lambda_{p}.T=C$ (1)

Where:

$T$ is in Kelvin (K)

$\lambda_{p}$ is the <u>wavelength of the emission peak</u> in meters (m).

$C$ is the <u>Wien constant</u>, whose value is $2.898(10)^{-3}m.K$

From this we can deduce that the higher the black body temperature, the shorter the maximum wavelength of emission will be.

Now, let's apply equation (1), finding $\lambda_{p}$ :

$\lambda_{p}=\frac{C}{T}$ (2)

$\lambda_{p}=\frac{2.898(10)^{-3}m.K}{273K}$

Finally:

$\lambda_{p}=10615(10)^{-9}m=10615nm$ This is the peak wavelength for radiation from ice at 273 K, and corresponds to the<u> infrared.</u>

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3 years ago

If two charged balloons are 24cm apart and they feel a force of electrical repulsion of 20N, what would the force of electrical

OverLord2011 [107]

Answer:

Soory

Explanation:

I really dont know but i will send you wait

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3 years ago

Instead, suppose that it was ﬁred upward at 60◦ with respect to a horizontal line. Then its horizontal component of velocity is

larisa [96]

Answer:

50 m/s

Explanation:

Angle = 60 degree

Horizontal component of velocity = 50 m/s

A projectile motion is the motion of an object in two dimensions under the influence of gravity.

In this case, the object has no acceleration along horizontal direction, it has acceleration in vertical direction which is equal to the acceleration due to gravity of earth.

When the projectile reaches at the maximum height it travels only along the horizontal and thus it has only horizontal velocity at that instant.

Thus, the velocity of teh projectile at maximum height is same as horizontal component of velocity that meas 50 m/s.

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3 years ago

Studying neutrinos helped to explain how our Sun works but led to changes in theories of particle physics, how is this process c

julsineya [31]

Explanation:

Yes, evidently, the process is consistent with the scientific process because in scientific process falsification and modification are two very important traits. So this new concept have modified the existing theories.

Through the modification a theory is adjusted without undermining other discovering made through the theory's prediction.

There are many other evidences that prove this fact for example Einstien's Theory of relativity also changes the existing concepts.

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2 years ago