Answer:
the two lines observed correspond to Hydrogen and Helium
Explanation:
One of the great principles of atomic physics is that the emission and absorption lines of atoms are the same, in addition, each different element has a series of characteristic lines with which we can identify it.
Bohr's atomic model allows to fully explain the spectrum of lines and absorption of Hydrogen, in this case the line
λ = 656 nm
corresponds to a hydrogen trasition of the Balmer series from state n = 3 to state n = 2
The other line identified λ = 587 nm does not correspond to any hydrogen line and neither to heavy element lines, so this line when it was discovered was assigned to a new element, which was called Helium. This line is explained this element was assigned an atomic number (charge) of +2 and a mass of + 4 u, specifically it is a transition from level n = 3 to level n = 2
therefore the two lines observed correspond to Hydrogen and Helium
Its like the weather man. They are the people you see on the news that use radars ect. To predict the weather.
Hope that helps?
The planet MARS is visible without a telescope on many clear nights. The planets JUPITER, MERCURY, VENUS and SATURN are also viewable without the aid of magnification.
Phase unbalance causes three-phase motors to operate at temperatures higher than nameplate ratings and, therefore, the motor cannot deliver its rated horsepower.
<h3>What is an electric vehicle (EV)?</h3>
An EV stands for an electric vehicle. Electric vehicles (EVs) are autos that are powered totally or partially by electricity.
Electric cars are extremely cost-effective to run because they have fewer moving parts to maintain and use little to no fossil fuels (petrol or diesel).
Hence, three-phase motors operating with phase imbalance run at temperatures over nameplate limits, which prevents the motor from producing its rated horsepower.
.
To learn more about electric vehicles here,
brainly.com/question/27434548
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Answer:
Well I'll say the answer is
A.21
B.21
Explanation:
The law of conservation of momentum states that the total momentum in a system remains constant
And
To find the Total momentum in a body, you'll have to multiply the mass of the body to it's velocity
And
To find the total momentum, you'll add the momenta in every body present in the system