William Gilbert used a terella in an attempt to explain : B. why compasses point toward the north and south poles of the earth
Terella was used in earlier time to simulate earth magnetosphere before it was replaced by computers
hope this helps
A graph that can be used to visualize or systematize the generation of ideas based upon a certain topic.
The speaker's tone in "Harlem" is best described as frustrated.
The poem's imagery helps to convey this tone. In discussing a deferred dream, Hughes describes a dried up raisin in the sun; a festering sore; stinking, rotting meat; and a sagging, heavy load. At the end of the poem, he wonders if the deferred dream just explodes.
This imagery helps provide the key to understanding the speaker's attitude, or tone, about his subject, the deferred dream. He is frustrated that these dreams are wasted.
