Which statement accurately describes how observations of distant galaxies help us learn about galaxy evolution?
A) By observing galaxies with different lookback times, we learn how galaxies appeared at different stages of their evolution.
B) We can observe the birth of galaxies.
C) We can observe the evolution of a single galaxy over time.
D) We can watch as two galaxies merge and view the result, helping us learn how mergers affect evolution.
E) We can see what our galaxy used to look like and therefore theorize about the physical processes that led to its current appearance.
A) By observing galaxies with different lookback times, we learn how galaxies appeared at different stages of their evolution.
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What is the momentum of a proton when it is moving with a speed of 0.60c? (mproton = 1.67 × 10-27 kg)
A) 1.2 × 10-19 kg? m/s B) 1.5 × 10-19 kg ? m/s C) 3.0 × 10-19 kg ? m/s D) 3.8 × 10-19 kg ? m/s
An auto accelerates forward from 7.0 m/s at a uniform 0.71 m/s2. It travels a distance of 1.033 km while accelerating. (a) How fast is the auto moving just as it is traveled the 1.033 km? (b) How many seconds did it take to travel the 1.033 km?
What will be an ideal response?
Like Olympus Mons, volcanoes on Venus
A) have been extinct for billions of years. B) are shield volcanoes. C) form where continental plates collide. D) only form at the equator. E) are much larger than typical volcanoes on Earth.
The type of mineral formed is determined by
A) crystallization. B) the elements present and the conditions that lead to formation. C) silica content. D) chemical bonding.