As a supersonic aircraft gains speed, the angle of its shock wave
A) narrows.
B) widens.
C) remains unchanged.
Answer: A
You might also like to view...
A 3.0-kg mass is released from rest at point A of a circular frictionless track of radius 0.40 m as shown in the figure. The mass slides down the track and collides with a 1.4-kg mass that is initially at rest on a horizontal frictionless surface. If the masses stick together, what is their speed after the collision?
A. 2.1 m/s B. 1.7 m/s C. 1.9 m/s D. 1.5 m/s E. 2.3 m/s
When a damping force is applied to a simple harmonic oscillator which has period T0 in the absence of damping, the new period T is such that
a. T < T0. b. T = T0. c. T > T0. d. ?T < ?0T0. e. ?T > ?0T0.
During what month will the full moon achieve its maximum altitude, as observed from Wash ington, D.C. (39°N)? When will it have its minimum altitude?
A solid conducting sphere of 10 cm radius has a net charge of 40 nC. If the potential at infinity is taken as zero, what is the potential at the center of the sphere?
a. 360 mV c. >3.6 × 10^4 V b. 3.6 × 10^3 V d. 36 mV