the answer is d it reflects all the wavelengths of visible light.
The characteristics of stars that can be determined by analyzing a star's spectrum - Doppler shift, temperature, size, composition, and rotation.
1- Rotation: The star's rotation creates a broadening of the spectral lines, which can be used to determine the star's rotation.
2- Temperature: Measure the relative strengths of spectral lines to determine a star's spectral class which corresponds to temperature.
3- Doppler shift: The Doppler shift of the star is determined by its radial velocity.
4- Size: Measure the width of spectral lines. If the lines are narrow, the star's diameter is large. If the lines are wider, the star's diameter is smaller.
5- Composition: Computer models and temperature are used to determine elemental abundances from relative strengths of absorption lines in a star's spectrum.
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Answer:
15.C Mucus reduces friction
The force produced on a particle of charge q by an electric field of intensity E is
in our problem, the force is F=5.0 N while the charge is q=2.0 C, so we can find the intensity of the electric field:
The relationship between electric field intensity and potential difference
between two points A and B is
where d is the distance between the two points. By using d=6.0 m, we find
where the negative sign means that the initial point, VA, is at higher potential than the final point VB.
Answer:
Frequency = 2Hz
Explanation:
In simple harmonic motion,
Frequency is given by the formula;
f = (1/2π)√(k/m))
Where,
k is spring constant and
m is mass
Now, the question says there are 4 suspension springs with each having a spring constant of 47100 N/m. Thus, the total amount of spring constant will be;
K_total = 4 x 47100 N/m = 188,400 N/m
Thus, let's now find the frequency since we have m = 1190kg
f = (1/2π)√(k/m)
f = (1/2π)√(188400/1190)
f = (1/2π) x 12.5825
f = 0.159149 x 12.5825 = 2 Hz