Why does a sonic boom irritate people on the ground below a supersonic aircraft and not passengers inside the aircraft?
What will be an ideal response?
Answer: People on the ground below encounter the aircraft's shock wave, whereas passengers inside do not—because the shock wave produced by the aircraft is not incident upon the passengers inside. Consider the analogous case of a boat on a river. People on shore may be doused by the bow wave as the boat passes, but passengers inside the boat don't encounter the bow wave at all. Or a dolphin at a sea-world show may splash onlookers while not encountering the effects of the splash.
You might also like to view...
Cities have higher rates of lung disease than rural areas
What will be an ideal response?
A +5.0-nC charge is at the point (0.00 m, 0.00 m) and a -2.0-nC charge is at (3.0 m, 0.00 m). What work is required to bring a 1.0-nC charge from very far away to point (0.00 m, 4.0 m)? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 15 nJ B) 3.6 nJ C) 11 nJ D) 7.7 nJ
Energy Conservation With Conservative Forces: A 5.0-N projectile leaves the ground with a kinetic energy of 220 J. At the highest point in its trajectory, its kinetic energy is 120 J. To what vertical height, relative to its launch point, did it rise if there was no air resistance?
A. 44 m B. 24 m C. 20 m D. 10 m E. It is impossible to determine the height without knowing the angle of launch.
A tiny spring, with a spring constant of 1.30 N/m, will be stretched to what displacement by a 0.00500-N force?
a. 3.85 mm b. 7.69 mm c. 11.5 mm d. 6.50 mm e. 3.25 mm