Ask your own question, for FREE!
Mathematics 19 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

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!