How can u make a telephone string more efficient? Suggest some ways
Answers
- cotton string
cotton stringStep 1. You will need 2 empty tin cans, a hammer, a nail or screw, masking or duct tape, and a long piece of cotton string or fishing line, about 10 to 30 feet in length.
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Bring Science Home
Bring Science Home
Talk through a String Telephone
Bring Science Home: Activity 5
By Katherine Harmon on May 6, 2011
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Key concepts
Sound
Waves
Hearing
From National Science Education Standards: Transfer of energy
Introduction
Have you ever tried to have a conversation with someone so far away that you couldn't really hear each other? Without yelling, it's hard to have a conversation over long distances. So these days it's nice to be able to use telephones to talk with someone—whether he or she is 100 yards or 100 miles away.
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