Question

As pilots get closer to the speed of sound:
o a. the airplane becomes more difficult to fly because there is more
drag from air molecules.
o b. the air molecules move out of the way more quickly, which creates
a sonic boom.
c. there is not enough thrust to propel the airplane past the sound
waves.
d. they notice that the airplane uses less fuel because the pull of
gravity decreases.

Answer 1

the airplane becomes more difficult to fly because there is more drag from air molecules.

drag is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid.

This can exist between two fluid layers or between a fluid and a solid surface. Unlike other resistive forces, such as dry friction, which are nearly independent of velocity, the drag force depends on velocity.

Drag force is proportional to the velocity for low-speed flow and the squared velocity for high speed flow,

where the distinction between low and high speed is measured by the Reynolds number.

Drag forces always tend to decrease fluid velocity relative to the solid object in the fluid's path.

since the pilot approaches the speed of sound and doesn't actually surpass it , it will not create sonic boom as this phenomenon takes place only after the object surpasses the speed of sound.

learn more about drag here:

https://brainly.com/question/14555285

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