Question

question 3 of 10
an airplane specifically designed to fly at high altitudes may have:
a. smaller wings to make it more aerodynamic.
b. an added tank of oxygen to mix with the fuel for the combustion reactions.
c. a battery that provides additional power for the extra thrust needed.
d. an extra engine to burn more fuel and create more thrust.

Explanation:

At high - altitudes, air density is lower. Oxygen is required for fuel combustion in engines. To ensure proper combustion, an airplane designed for high - altitudes may need an added oxygen tank to mix with the fuel. Smaller wings don't directly address high - altitude challenges related to combustion. Batteries aren't typically used for extra thrust in this context, and adding an extra engine is not the most common or efficient way to deal with high - altitude issues compared to adding oxygen for combustion.

Answer:

B. an added tank of oxygen to mix with the fuel for the combustion reactions.