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makkiz [27]
3 years ago
7

Which statement is correct about an element’s identifying spectrum? a) The light reflected off an element produces a unique iden

tifying spectrum. b) The light absorbed by an element produces a unique identifying spectrum. c) The light refracted by an element produces a unique identifying spectrum. d) Light emitted by an element produces a unique identifying spectrum.
Physics
2 answers:
kirza4 [7]3 years ago
7 0

Answer:

<h2>d) Light emitted by an element produces a unique identifying spectrum.</h2>

Explanation:

Every atom in the existence is formed by protons, neutrons and electrons. These electrons surround the nucleus in specific arrangements called orbitals, you can imagine it like a planetary system. The fact is that each orbital has an specific amount of energy, and electrons cannot go up or down these orbitals if the energy isn't change.

In addition, when an atom absorbs energy, the electrons inside can jump to a higher orbital temporarily and then go back to its natural position. However, it happens the opposite effect if an atom ejects energy, the electrons jump to a lower orbital, expelling energy in form of electromagnetic waves, and depending on the length of those waves, a color is seen. This electron's jumps happen all the time, and each material have a specific behaviour, which gives specific electromagnetic waves, specific colors, and the formation of those colors is what is called a spectrum, that's why is unique.

Therefore, the correct answer is d.

Ronch [10]3 years ago
3 0

Answer:

correct answer is option d (Light emitted by an element produces a unique identifying spectrum.)

Explanation:

Each element has different atomic number and atoms of an element can radiate a certain amount of energy. Different elements have different atomic spectrum and it can be used to determine the composition of a material.

When atoms are excited to higher energy state after some time they came back to lower state by emitting their excess energy in the form of light. This light has certain wavelength. This emitted light can be seen as a series of different colored lines and between two colored lines there is a dark space. This series of colored lines is called a line spectra or atomic spectra.

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sveticcg [70]

Answer:

Because we don't?

Explanation:

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3 years ago
On the decibel scale, an increase of 10 decibels means an intensity increase of __________times?
Sonbull [250]

Answer:

10

Explanation:

The decibel or decibel, is a unit that relates two values ​​of sound pressure, and electrical power. the base unit is the bel, but given the amplitude but for practicality, a submultiple, the decibel, is used. It is a scalar expression .

Zero belios is the reference value used as a base, hence a bel is equivalent to 10 decibels and means that there is a power increase of 10 times over the reference value.

3 0
3 years ago
Read 2 more answers
In a choir practice room, two parallel walls are 5.70 m apart. The singers stand against the north wall. The organist faces the
ololo11 [35]

Answer:

4.98 m

Explanation:

Given that

Width of the mirror, d = 0.6 m

Organist distance to the mirror, s = 0.78 m

Distance between the singer and the organist, S = 5.7 + 0.78 = 6.48 m

Width of north wall, D?

Using the simple relationship

D/S = d/s, on rearranging

D = dS /s

D = (0.6 * 6.48) / 0.78

D = 3.888 / 0.78

D = 4.98 m

Therefore, we can conclude that the Width of north wall is 4.98 m

7 0
2 years ago
1) On the way to the moon, the Apollo astro-
kramer
(1) You must find the point of equilibrium between the two forces,

<span>G * <span><span><span>MT</span><span>ms / </span></span><span>(R−x)^2 </span></span>= G * <span><span><span>ML</span><span>ms / </span></span><span>x^2
MT / (R-x)^2 = ML / x^2

So,

x = R * sqrt(ML * MT) - ML / (MT - ML)
R = is the distance between Earth and Moon.

</span></span></span>The result should be,
x = 3.83 * 10^7m
from the center of the Moon, and 

R - x = 3.46*10^8 m
from the center of the Earth.


(2) As the distance from the center of the Earth is the number we found before,
d = R - x = 3.46*10^8m
The acceleration at this point is
g = G * MT / d^2
g = 3.33*10^-3 m/s^2
6 0
3 years ago
If an object starts from rest, what is its initial velocity?
Vladimir79 [104]

Answer:

0 m/s

Explanation:

velocity= change in displacement/ time

at rest, the ball does not travel any distance

0/ t

=0

4 0
3 years ago
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