A ) Describe ONE way in which the painting shows a continuity in the sources of wealth of the kingdoms of Ghana and Mali. B ) Describe ONE way in which the painting shows a connection between the Middle East and West Africa.
C) Describe ONE way in which the painting shows the importance of Mansa Musa

How do astronomers measure the amount of dark matter in the universe

Which of these is a disadvantage of hydrogen fuel cells? a. engines that use hydrogen fuel are more efficient than gasoline-powered engines. b. the only emission produced by hydrogen fuel cells is water. c. hydrogen fuel is continually available and useful for heating. d. hydrogen fuel is often purified in a process that emits lots of greenhouse gases.

What happens when two galaxies approach each other? a. they form a black hole. b. they merge because of the strong gravitational pull they exert on each other. c. they shred each other into smaller galaxies. d. they form a supernova. e. they repel each other away because of their strong gravitational pull.