Suppose that you have obtained spectra of several galaxies and have measured the observed wavelength of the h-alpha line (rest wavelength = 656.3nm) to be: galaxy 1: 659.4 nm. galaxy 2: 664.1 nm. galaxy 3: 675.7 nm. 10. [4pt] calculate the redshift, z, for each of these galaxies. 11. [4pt] calculate the radial velocity of each of these galaxies. 12. [4pt] assuming a hubble constant of 66.4 km/s/mpc, calculate the distance to each of these galaxies (answer in mpc).

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b. b. at twice the distance, the magnitude of the field is 2b. c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.