A sound wave with a frequency of 100Hz travels in water with a speed of 1,500 m/s and then travels in air with a speed of 340m/s. Approximately how many time larger is the wavelength in water than in air?

answer; (arch); good luck

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

your answer is, orbit around the nucleus

i think the answer is a and b

i wish you luck