An aerospace engineer is designing a rocket to have three stages. Which is
not a reasonable explanation for this decision?
O
A. To simplify the design of the rocket
O
B. So the rocket only carries necessary mass
O
C. To take advantage of the lesser amount of thrust needed in space

D. To decrease the mass of the rocket as it flies

A not reasonable explanation for an aerospace engineer designs a rocket to have three stages is:

Explanation:

A three stages rocket permits to separate the fuel compartments. The rocket must be launched with a huge amount of fuel to last the entire travel. Then the initial mass of the rocket and the fuel is considerably large.

As the rocket flies, part of the fuel is consumed and so some compartements may be separated and removed decreasing the mass of the rocket as it flies (option D. is a reasonable explanation), so the rocket only carries the necessary mass (statement B. is a reasonable explanation).

As the rocket moves away from Earth, the gravitational force decreases and, in the space, the amount of thrust needed is lesser, which the aerospace engineers take into account for the design (choice C. is a reasonable explanation).

The only not reasonable explanation to design a three stage rocket is to simplify the design of the rocket: designing a rocket with three modules each with different features, functions, and the detachment mechanisms brings lot of complex problems to solve. So, option A. is the correct answer.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.