2. Using your average Hubble's constant, calculate the age of the Universe. For this, first, we use the following conversion factors: 1 km =1000 m 1 Mpc = 3.08567758149137×10²² m. 1 km/(s · Mpc) = 3.2407793×10*" 1/s. Notice the Hubble's constant is measured in units of inverse time. Therefore, the age of the universe is found via 1 tage Now using the formula above and Hve, find the age of the Universe in seconds. fage 3. Convert this to billions of years. For this, use the conversion factor: 1 billion years = 3.1556952×10' s Iage уears

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Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.