Imagine that you have obtained spectra for several galaxies and have measured the observed wavelength of a hydrogen emission line that has a rest wavelength of 656.3 nanometers. here are your results:
galaxy 1: observed wavelength of hydrogen line is 660.0 nanometers.
galaxy 2: observed wavelength of hydrogen line is 665.8 nanometers.
galaxy 3: observed wavelength of hydrogen line is 682.7 nanometers.

a) calculate the redshift, z, for each of these galaxies.
b) from their redshifts, calculate the speed at which each of the galaxies is moving away from us using the
doppler formula. give your answers as a fraction of the speed of light.
c) estimate the distance to each galaxy from hubbleʹs law.

What happens in a global convection cell

The bubba chump shrimp company processes and packages shrimp for sale to wholesale seafood distributors. the shrimp are transported to the main plant by trucks that carry 1,000 pounds (lb) of shrimp. once the continuous flow processing of the shrimp begins, no inventory is allowed in buffers due to spoilage and all of the shrimp must be processed within 12 hours to prevent spoilage. the processing begins at the sorter, where the trucks dump the shrimp onto a conveyor belt that feeds into the sorter, which can sort up to 500 lb per hour. the shrimp then proceed to the desheller, which can process shrimp at the rate of 400 lb per hour. however, after 3 hours and 45 minutes of processing, the desheller must be stopped for 15 minutes to clean out empty shrimp shells that have accumulated. the veins of the shrimp are then removed in the deveining area at a maximum rate of 360 lb per hour. the shrimp proceed to the washing area, where they are processed at 750 lb per hour. finally, the shrimp are packaged and frozen. what is the daily process capacity of the processing plant (excluding the packaging and freezing)?

Which of the following are guidelines to follow for obtaining accurate observations