<span>The answer is letter b.
During this period the U.S. set up a blockade to prevent Russian ships
from passing to Cuba. The U.S. was
alarmed after photos from a spy plane showed Russian missiles on Cuban
soil. This heightened American fears
that Russia would invade through Cuba and use the missile already set up
there. At this point in time, the world
was on the verge of nuclear war. Both
side weighed their options. After a tense period, secret negotiations brought
an end to the conflict. The Russians
withdrew their missiles from Cuba and the U.S. withdrew their missiles from
Turkey.</span>
Answer:
There is very little oxygen
Explanation:
That should be it. I'm 99% sure bc where there is higher altitude, there is less oxygen
I dont see a chart but the anser to your question is ... (C Federal)
The correct answer is B. They were able to find the orbit of a comet and predict the year of its return.
Edmond Halley was a British astronomer, geophysicist, mathematician, meteorologist, and physicist. Alexis Clairaut was a French astronomer, geophysicist, mathematician.
They were friends with Isaac Newton that before, had built a new theory of universal gravitation.
With this new theory, Newton calculated the orbit of the Great Comet of 1680. Later, Halley used Newton’s theory to calculate the orbits of several comets - even some that were in ancient records -. The thing is: Halley noticed that some comets had similar orbits, which led him to suggest that some comets may be periodic and that they may be moving along very elongated ellipses. This way he forecasted the comets return in a period of 76 years.
Since then, the comet has carried Halley’s name.
