
Concept explainers
The molecular clouds are held together by the force of only gravity.

Answer to Problem 1QAP
The given statement is false. The clouds are also pressed by the pressure of the hot gases filled in the space between the clouds.
Explanation of Solution
The molecular clouds are considered to be the main source of the planets and other celestial bodies. The molecular clouds are basically the huge clouds of dust and several cold gases that exist in space.
These clouds are held together by the force of gravitational attraction between the particles. Sometimes, the gravitational attraction becomes so high that the clouds collapse under their own force of attraction.
The molecular clouds are also held together by the pressure of the hot gas that is filled in the spaces between the clouds. The pressure of the gas plays a significant role in keeping the cloud intact.
Conclusion:
Thus, the given statement is false. The clouds are also pressed by the pressure of the hot gases filled in the space between the clouds.
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Chapter 5 Solutions
Understanding Our Universe
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