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sveticcg [70]
3 years ago
11

After days and days of work, a group of graduate students has finally measured the wavelengths of hundreds of lines in the spect

rum of a distant star. If a number of the lines come from molecules such as titanium oxide, the star is likely to be of which spectral type________.
Physics
1 answer:
Ilya [14]3 years ago
4 0

Answer:

Spectra type M

Explanation:

mass spectrum is simply an intensity vs. m/z (mass-to-charge ratio) plot representing a chemical analysis. Hence, the mass spectrum of a sample is a pattern representing the distribution of ions by mass (more correctly: mass-to-charge ratio) in a sample. It is usually acquired using an instrument called a mass spectrometer. Not all the mass spectra of a given substance are same.

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Does weight increase decrease or stays constant as altitude increases
mojhsa [17]

Answer: It stays the same, it is constant no matter what.

Explanation: Just because it may go faster/slower due to altitude change, it does not affect the weight.

4 0
4 years ago
You are holding a positive charge and there are positive charges of equal magnitude 1 m to your north and 1 m to your east. What
balandron [24]

Answer:

southwest

Explanation:

Here, all the particles have same charge this means that only repulsive force is acting on the particles according to Coulomb's laws.

One particle is 1 m to my north and another particle is to my east.

The particle to my north will push the positive charge I am holding to the south and the particle to my east will push the positive charge I am holding to the west.

Hence, the resultant direction of the force will be southwest.

6 0
4 years ago
Two deuterium nuclei, H, fuse to produce a tritium nucleus, H, and a hydrogen nucleus. A neutral deuterium atom has a mass of 2.
Nesterboy [21]

<u>Answer:</u> The amount of energy released in the process is 4.042 MeV.

<u>Explanation:</u>

The chemical reaction for the fusion of deuterium nucleus follows the equation:

_1^2\textrm{H}+_1^2\textrm{H}\rightarrow _1^3\textrm{H}+_1^1\textrm{H}

Atomic mass of the nucleus also contains some mass of the electrons.

Mass of electron in MeV/c^2 is 0.511MeV/c^2

  • <u>Calculating the mass of deuterium nucleus:</u>

m(_1^2\textrm{H})=(2.014102u)\times (931.494MeV/c^2.u)-\text{Mass of electron}

So, initial mass of the reaction = 2[(1876.124MeV/c^2)-(0.511MeV/c^2)]=3751.226MeV/c^2

  • <u>Calculating the mass of tritium nucleus:</u>

m(_1^3\textrm{H})=(3.106049u)\times (931.494MeV/c^2.u)-\text{Mass of electron}

m(_1^3\textrm{H})=(3.106049u)\times (931.494MeV/c^2.u)-(0.511MeV/c^2)=2803.921MeV/c^2

So, final mass of the reaction = 2803.921-[(1.007267u\times 931.494MeV/c^2.u)]=3747.184

Difference between the masses of the nucleus:

\Delta m=m_{initial}-m_{final}\\\\\Delta m=(3751.226-3747.184)MeV/c^2=4.042MeV/c^2

Energy released in the process is calculated by using Einstein's equation, which is:

E=\Delta mc^2

Putting value of \Delta m in above equation, we get:

E=(4.042MeV/c^2)\times c^2\\\\E=4.042MeV

Hence, the amount of energy released in the process is 4.042 MeV.

4 0
3 years ago
Which of the following statements describe the transfer of energy?
Lady_Fox [76]

The answer should be A weighlifter lifting 100lb. bell bar from his chest to a certain height.

7 0
3 years ago
Calculate the magnitude of the following vector components in OX and OY directions​
12345 [234]

Answer:

Very easy question

For x-component, we use Fₓ = Fcosα

For y-component, we use Fy = Fsinα

The major problem is with angle α.

Here α = 90+30

Because the angle is measured from +ve X-axis.

By putting values if you know co-ratios that how Sin and cos Convert to each other then you have got it.

So for further calculation,

Fₓ = Fcos(90+30) = 25(-sin30)

Fₓ = -25(1/2) = 25/2 = 12.5  - will be eliminate because force in magnitude is not "-ve"

As it is

Fy = Fsin(90+30) = Fcos30

Fy = 25 (√3 /2) = 25√3/2

......................................................................................

3 0
3 years ago
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