ENME 392 - Homework 6 - Sp12_Solutions

# ENME 392 - Homework 6 - Sp12_Solutions - ENME392 Spring...

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1 ENME392 Spring 2012 Homework 6 Solutions For this problem, you may work in groups of up to 4. Obtain a box or box lid of approximately 9” x 13”. Draw a square on the bottom of it that is 3.5” on each side; the square can be off center. From a height of approximately 15”, drop 20 coins into this container. Make sure all the coins land inside; otherwise, toss again. i) Count how many coins fall into the square, rounding to the nearest integer. ii) Count the number of heads. Record these numbers. Repeat for a total of 100 throws. Make sure you shake the coins well before tossing, and check that you still have 20 coins every 3-4 tosses. Here are some practical tips. You may find it easiest to keep count of the heads by picking them up as you count them. It can help to tape down the cardboard flap on one corner so that you can easily “pour” out the remaining coins. Use a container with sides that are several inches high to avoid too many coins jumping out; lower the drop height if necessary. Calculate and plot the following. You may find it easiest to do this in Excel. a) Attach your raw data in the form of a table with toss number, # heads, and # of coins in the square.

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