Which of the following is an example of energy being transferred by sound waves? a loud clap of thunder causes a window to vibrate. an opera singer sings a high-pitched note, causing a glass to break. colin hits a drum, causing the small bones in his friend's ear to vibrate.

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?