1. Find the period of a simple pendulum of length 1.00 m.

The tension in a string is provided by hanging an object of mass m=3.00 kg at one end as shown in the figure below. The length of the string is L=2.50 m and its mass is ms= 50.0 g. What is the speed of waves in m/s on the string? 3kg The frequency of a car horn is 400 Hz. Find (a) the wavelength of the sound, and (b) the frequency observed if the car moves with a speed us = 34.0 m/s through still air toward a stationary receiver. Take the speed of sound in air to be 340 m/s. (c) Find the frequency observed if the car is stationary and a receiver moves with a speed us= 34.0 m/s toward the car