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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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a tire has a tread pattern with a crevice every 4.00 cm. each crevice makes a single vibration as the tire moves. what is the fr
koban [17]

the frequency (in hz) of these vibrations if the car moves at 24.2 m/s is 605 HZ .

Calculation :

frequency = \frac{number of contacts}{second}

frequency = \frac{24.2 m/s}{1}*100cm*\frac{1}{4cm}

= 605 HZ

Frequency describes the number of waves passing through a particular location in a particular time. So if the wave takes 1/2 second to travel, the frequency is 2 per second. If it takes 1/100th of an hour, the frequency is 100 per hour.

Frequency is the number of occurrences of a repeating event per unit time. ... sometimes called time-frequency for clarity,

Learn more about frequency here : brainly.com/question/254161

#SPJ4

5 0
1 year ago
A goose waddles 18.0 m north and then 5.00 m east. He then walks 2.00 m south and 2.00 m west. What is the magnitude and directi
olya-2409 [2.1K]
Your answer should be 16.3 m 79.4º east of north
7 0
3 years ago
A see-saw is balanced on a pivot with two children on it. One child is sitting 1.5 m to the left of the pivot and has a mass of
Lorico [155]

Answer:

Explanation:

Remark

This is a second class lever. It is much more efficient than the fishing pole problem. All distances are measured from the pivot in these kinds of questions.

Givens

d1 = 1.5

d2 = ?

m1 = 50 kg

m2 = 30 kg

The lighter child will have to sit further away from the pivot to make the two conditions equal.

Formula

d1*m1 = d2*m2

1.5*50 = d2 * 30

75 = 30 * d2

75/30 = d2

d2 = 2.5

Remark

Notice that the distance is longer for the lighter child. The fact that these are masses and not forces does not matter, but you should take note of it. There is a difference between masses and forces. See the fishing pole problem.

Answer to the multiple Choice question. No motion on this kind of problem means equal moments. The answer is D

Problem 2

1) The wheels are further apart making B more stable. The wider the distance the wheels are apart, the harder it would be to tip the concrete mixer over

2) The center of gravity is lower. The higher the force is the more chance you have of exerting an external force to tip the mixer over.

7 0
2 years ago
Find the frequency of a wave with the wavelength 3.5 m and the speed is 50 m/s. <br>​
Andru [333]

Answer:

8.57 Hz

Explanation:

From the question given above, the following data were obtained:

Wavelength (λ) = 3.5 m

Velocity (v) = 30 m/s

Frequency (f) =?

The velocity, wavelength and frequency of a wave are related according to the equation:

Velocity = wavelength × frequency

v = λ × f

With the above formula, we can simply obtain the frequency of the wave as follow:

Wavelength (λ) = 3.5 m

Velocity (v) = 30 m/s

Frequency (f) =?

v = λ × f

30 = 3.5 × f

Divide both side by 3.5

f = 30 / 3.5

f = 8.57 Hz

Thus, the frequency of the wave is 8.57 Hz

7 0
2 years ago
Velocity is described by __ and time
klasskru [66]

Answer:

direction and time

Explanation:

4 0
3 years ago
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