What is the mass of air in a room that measures 5.0 m × 8.0 m × 3.0 m? (The density of air is 1/800 that of water)
150 kg
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The birth of stars is a battle between gravity and radiation pressure
Indicate whether the statement is true or false
Two flat rings each having outer diameter of 6 inches and inner diameter of 3 inches are parallel and 4 inches apart as shown. Determine the shape factors, F1-2 and F2-1, which are equal.
When we make an observation of a distant galaxy 10 billion light-years away, we are seeing this galaxy as it
A) is right now B) was when the universe was only 10 billion years old C) was when the universe was formed D) will be in 10 billion year's time
What do sunspots, solar prominences, and solar flares all have in common?
A) They all occur only in the Sun's photosphere. B) They are all shaped by the solar wind. C) They are all strongly influenced by magnetic fields on the Sun. D) They all have about the same temperature.