The Sombrero Galaxy is located roughly 30 million light-years from the Milky Way and is moving away from the Milky Way at a speed of 1000 km/s. If we observe absorption by sodium at a wavelength of 589.0 nm in a laboratory on Earth, at what wavelength do we observe the same sodium absorption in the spectrum of the Sombrero Galaxy?

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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