If you face a cliff and give a shout, you will hear an echo. Are the sound waves of the echo inverted (A) or upright (B) compared to the waves of your original shout?
A. Inverted
B. Upright
B. Upright
You might also like to view...
Which of these seems the best present answer to the flatness problem?
A) The superforce rules creation. B) Dark Energy speeds the universe on out to infinity. C) Symmetry in creation of particles and antiparticles D) The inflationary epoch E) The GUT theory
A satellite is in a circular orbit about the Earth at an altitude at which air resistance is negligible. Which of the following statements is true?
a. There is only one force acting on the satellite. b. There are two forces acting on the satellite, and their resultant is zero. c. There are two forces acting on the satellite, and their resultant is not zero. d. There are three forces acting on the satellite. e. None of the preceding statements are correct.
The period T of the fundamental mode of the air in a pipe open at one end and closed at the other is equal to what multiple or fraction of the time ?t required for a sound wave to travel from one end of the tube to the other?
A. T = ?t/4 B. T = ?t/2 C. T = ?t D. T = 2?t E. T = 4?t
Ron fills a beaker with glycerin (n = 1.473) to a depth of 4.0 cm. If he looks straight down through the glycerin surface, he will perceive the liquid to be what apparent depth?
a. 5.9 cm b. 4.0 cm c. 2.7 cm d. 3.3 cm e. 4.9 cm