An airplane flying with a constant speed flies from a warm air mass into a cold air mass. The Mach number (the ratio of the speed of the airplane to the speed of sound) will:
a. increase.
c. stay the same.
b. decrease.
d. become unstable.
A
You might also like to view...
A white dwarf generates energy through fusion
a. True b. False Indicate whether the statement is true or false
At first, the Sun's present-day rotation seems to contradict the prediction of the nebular theory because
A) the theory predicts that the axis of rotation should not be perpendicular to the orbital plane of the planets, but it is. B) the axis of rotation precesses slowly, which the theory does not predict. C) the present-day rotation is in the opposite direction from that predicted by the theory. D) the theory predicts that the Sun should have been rotating fast when it formed, but the actual rotation is fairly slow. E) the theory predicts that the Sun should not have been rotating when it formed, but the Sun actually rotates today.
A sound with a frequency of 25 kHz is in the ______________ region of the sound spectrum
a. infrasonic b. ultrasonic c. audible d. visible
What can be used to reconstruct the past vegetation of an area and infer environmental conditions
What will be an ideal response?