Due wednesday by 11: 59pm points 20 submitting a file upload in this lab you will use hubble's law to find the distances to eight different clusters of galaxies. the galaxy clusters you will use are all abell clusters, (relatively) nearby groups of galaxies named after the astronomer who studied them: george abell. as you learned, hubble's law relates the recessional velocity (v) in km/s to distance (d) in megaparsecs (mpc) for galaxies in our universe: v = h ⋅ d the redshifts of most galaxies in each cluster are easily available from their spectra. you will find the average redshift of galaxies in each cluster, and then convert this to velocity, and then to distance. finally, you will find the lookback time to the most distant cluster. navigate to voyages: distances to galaxies (links to an external site.)links to an external site.. for each cluster in turn, click its link under "first, observe and appreciate" to open it in the skyserver navigate tool. follow the directions under "record the redshift to each cluster" t

Atransverse wave is traveling on a string stretched along the horizontal x-axis. the equation for the vertical displacement y of the string is given by y = (1.8 x 10-3)cos[π(13x - 60t)], where all quantities are in si units. what is the maximum speed of a particle of the string

Hen a gfci receptacle device is installed on a 20-ampere branch circuit (12 awg copper), what is the minimum volume allowance (in cubic inches) required for conductor fill for each conductor in the outlet box?

Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a spring–mass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (“dark absorption lines”)? explain briefly.