A galaxy is observed to be at 10.0 Mpc from Earth. If it is receding at 520 km/s, calculate the Hubble's constant.
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Q: If a galaxy is 10.0 Mpc away from Earth and recedes at 520 km/s, what is Hubble's constant?
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Q: Calculate the age of the universe for the following Hubble’s constant, (a) 30 km/s/Mpc
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