Physics, 24.07.2019 22:30 AgentPangolin
How can an element be identified using its emission spectrum? a. by measuring the frequencies of the spectral lines, and calculating the energies that these correspond to b. by measuring the wavelengths of the spectral lines, and then calculating the differences between adjacent wavelengths c. by heating the unknown element, and then comparing the emitted spectrum with known spectra of the elements d. by identifying the color of the first line of the spectrum, and comparing this to a chart of known spectra
Answers: 1
Physics, 22.06.2019 11:00
Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?
Answers: 3
Physics, 22.06.2019 12:30
Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4ā¶14ā¶1 transition. =Ī»=
Answers: 2
Physics, 22.06.2019 15:00
A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the blockās final velocity over the 18 meters?
Answers: 2
How can an element be identified using its emission spectrum? a. by measuring the frequencies of th...
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