Lesson 2 WAVES AND SOUND Module 2 - Standing Waves Activity 4: Casper, the Friendly Telephone Operator Directions: Solve the problem stated below, minding your significant figures. Show complete solution. You and your friend, Casper, are playing with your own homemade two-way telephone using two empty tin cans and 10.0 meters of nylon thread. The thread has a mass of 25.0 grams. a. Standing 10.0 meters away from each other and holding each of the tin cans, you both pulled on the string to give it a 1.56 N tension. When you started speaking into your tin can, how long before Casper can "somehow" hear you? b. Tired with playing telephone, you told Casper to hold on to his tin can firmly while you shake yours vertically. If the tension in the string is cut in half, what is the fundamental frequency of the standing wave in the string? c. At what frequency will the standing wave in the string move if you want to have two and a half (2.5) waves along the entire length of the string