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In a binary star system, one component is found to have about 3 solar masses, the other about 7 solar masses. The 3-solar-mass star is visible from Earth, but the 7-solar-mass star is not. Theoretical considerations declare that the 7-solar-mass star must be a
Railroad Industry
A sector focused on the construction, operation, and management of railways, which are critical for the transportation of goods and passengers.
Corporations
Organized entities recognized by law as having a distinct identity, separate from their owners, and authorized to operate a business.
Social Gospel Movement
A religious and social reform movement in the late 19th and early 20th centuries that sought to apply Christian principles to social problems, such as poverty and inequality.
Individual Salvation
The concept in some religious beliefs that pertains to the salvation or redemption of an individual's soul from sin and its consequences.
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