N hydrogen, the transition from level 1 to level 2 has a rest wavelength of 121.6 nm. Suppose you see this line at a wavelength of 124.2 nm in a Star. What is the velocity of this in the direction of the Earth?

velocity of this in the direction of the Earth is 6.4 ×  m/s

Explanation:

given data

wavelength = 121.6 nm

wavelength = 124.2 nm

solution

we get here first change in wavelength that is

= 124.2 nm - 121.6 nm    ...............1

= 2.6 nm  

we get here velocity of direction of the Earth that is express as

    ............2

put here value we get v

v =    

v = 6.4 ×  m/s

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )