A sound wave travels through air with a speed of 520 m/s and a wavelength of 25 cm. the frequency of this sound wave is: A: 500 Hz B: 130 Hz C: 2080 Hz D: 1500 Hz

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive