Does the sentence "H2 is used as the rotor coolant in electrical generators at power stations, because it has the highest thermal conductivity of any gas." provide a valid answer to the question "How is H2 used in electrical generators at power stations?"

A: yes

Does the sentence "To save space and for ease of reading, these are typically circular devices rather than the classic linear slide rule shape." provide a valid answer to the question "What is the slide rule used for?"

A: no

Does the sentence "For instance, genetic studies of African Americans show an ancestry that is on average 1718% European." provide a valid answer to the question "What percentage of African Americans have European ancestry?"

A: yes

Does the sentence "Several Bantu kingdomsnotably those of the Kongo, the Loango, and the Tekebuilt trade links leading into the Congo River basin." provide a valid answer to the question "When did Bantu tribes arrive in the area formerly populated by the Pygmy people?"

A:
no