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Mathematics 8 Online
OpenStudy (anonymous):

Why do scientists believe that dark matter exists even though it cannot be seen? a. We can observe its gravitational effects. b. It is observed to emit light. c. We can measure its mass

OpenStudy (anonymous):

wrong place dear!!

OpenStudy (anonymous):

post specific questions in specific group

OpenStudy (anonymous):

oopps my my bad didnt even notice xD

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