6.2.3. The Universe
A subsection of Physics, 0625, through 6. Space physics
Listing 10 of 29 questions
The Milky Way is the galaxy in which the Solar System is located. State what a galaxy is. The Milky Way has a diameter that is approximately equal to 100 000 light-years. Determine this distance in kilometres . distance = km Astronomers determine the speed and distance from the Earth of a far galaxy that is moving away from the Earth. State one observation that allows the speed at which a galaxy is moving away to be determined. State one different observation that is used to determine the distance to a far galaxy. State how the speeds of galaxies and their distances from the Earth are related. The best estimate for the Hubble constant H0 is 2.2 × 10–18 per second. Use this value to calculate an estimate for the age of the Universe. age of the Universe = s
0625_w24_qp_41
THEORY
2024
Paper 4, Variant 1
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