A violin has a string length of L = 32 cm. The second string of the violin is tuned to the musical note A4 whose frequency is 440 Hz. a.) What is the wavelength of this string’s first normal mode?
b.) What is the wave speed on this string?
c.) The vibrating string sets the air in vibration.
d.) Given that the speed of sound waves in air is 343 m/s, find the frequency and the wavelength of the sound waves in air. Why are wavelengths different on the string and in the air?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

Frequency of electromagnetic waves that a radio station is assigned is called