At the present time, the only way we know of that light can get shifted
toward the blue end of the spectrum is the Doppler effect ... wavelengths
appear shorter than they should be when the source is moving toward us.
IF that's true in the case of the Andromeda galaxy, it means the galaxy is
moving toward us.
We use the same reasoning to conclude that all the galaxies whose light is red-shifted are moving away from us. That includes the vast majority of all galaxies that we can see, and it strongly supports the theory of the big bang
and the expanding universe.
If somebody ever comes along and discovers a DIFFERENT way that light
can get shifted to new, longer or shorter wavelengths, then pretty much all
of modern Cosmology will be out the window. There's a lot riding on the
Doppler effect !
Answer:
Either temperature or energies but I am pretty sure its temperature
Explanation:
Answer:
c) 100,000 m/s
Explanation:
You need to take the same wave length from the top graph and bottom one, so let's take half a wave length then in the top one that is 0.005, but in the bottom one it's 2000/4 = 500 because they are smaller and there are 4 half waves before you get to 2000, whereas in the top one there is 1 half wave before you get to 0.005 on the graph.
Now use speed = distance / time
speed = 500 / 0.005 = 100 000 m/s
Answer:
Explanation:
heat lost by block of copper
= mass x specific heat x fall in temperature
= .04 x 385 x ( 95 - 24 )
= 1093.4 J
Heat gained by water
= .105 x 4200 x ( 24 - T ) ; Here T is initial temperature of water .
= 441 ( 24 - T )
heat lost = heat gained
1093.4 = 441 ( 24 - T )
24 - T = 2.48
T = 21.52 ℃
<span>"forefinger in the direction of the lines of force" 100% correct, I took the test.</span>
