St. Louis Science Center Planetarium Mathematics I.
Planetarium Playground Echo Pipe
Name ____________________ Date __________
Solve the problem(s) stated below and attach any graph paper graphs or diagrams. Turn this in to your teacher for class interest. If you wish to email your work to the address below - please use your initials in place of your name. You will probably not get a return response other than a smile. For helpful suggestions link here. For resource equations or formulas related to the St. Louis Science Center Planetarium click here: 
Problem:
( Print this page to work and turn in. )
Echo Time
You may use a general speed of sound or from a Web search and today's weather report and approximate elevation of the dish, calculate the speed of sound.
If the echo pipe is 100 feet long, how much time does it take your sound to return in this pipe?
Would you expect a flash of light to travel from the moon to the earth to take less time?
How about the time it takes to toss a juggling ball 16 inches high.
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