EMAT 3500 Lab Descriptions

 

A group of 4 people will be responsible for setting up and running each lab. While one person in your group runs your lab for other students, the rest of your group will visit another lab.  You will take turns in running your own lab so that each of you has an opportunity to collect data in each lab. For each lab you will record a set of paired data points (at least ten data pairs for most labs).  Record these data pairs in list 1 and list 2 of your TI-83, 83 plus or 84 calculator (or any calculator that has list and STAT capabilities) so that you can create a scatter plot for each lab (independent variable in list 1 and dependent variable in list 2).  Also keep a paper record of your data pairs.

 

  1. Bouncing Ball

 

There are two ways to collect this data:

 

  1. Balancing Pennies

 

The data from this experiment are needed for your Assignment 16, so please save your data!

 

Create a small fulcrum on which to balance a meter stick (a thick marker works fairly well but you will need to find a way to stop it from rolling).  Record the balance point of the meter stick (e.g. 50 cm).  Place one penny on the beginning of the meter stick (between the 0 and 2 cm marks).  Move the meter stick so that it balances.  Record the new balance point of the meter stick (e.g. 47.5 cm).  Add a second penny on top of the first penny at the beginning of the stick and repeat the procedure.  Continue repeating the procedure for a maximum of ten pennies on top of each other.

 

  1. Chill Out!

    Use a temperature probe with a CBL unit to record the cooling of the temperature probe after being immersed in a beaker of hot water (see detailed instructions on provided activity sheet).  You will graph the temperature of the cooling probe over time. The objective is to find a function that fits the collected data and use this function to predict the room temperature in degrees centigrade and how long it would take the probe to reach room temperature.  You should record the starting temperature of the water, your best-fit function, the estimated room temperature and the estimated time to reach room temperature.

 

 

  1. It's a Ramp

 

Use the ramp provided that is approximately one meter in length.  Mark a line 2 meters from the end of the ramp.  Devise a way to measure the angle that the ramp makes with the floor. Start the ramp with a very small angle (almost level with the floor).  Release the ball at the top of the ramp and time how long it takes to cross the line that you marked 2 meters from the end of the ramp.  Vary the angle of the ramp and repeat the procedure.  Take at least ten different measurements.

 

 

  1. Light Intensity

 

Dr. Olive will assist in the set up of this lab.  Using the CBL light sensor and TI-83plus calculator, you will collect data for the intensity of light emanating from a source as you vary the distance of the sensor from the light source.  The sensor should start at least 30 cm from the light source and move away from the source 10 cm at a time.  You will record the intensity reading from the CBL and the distance from the source in your two data lists (see detailed directions for collecting data).


  1. Pendulum Swing

 

 

Create a pendulum with a weight and a piece of string (at least 100 cm in length).  Secure the top of the string to the clamp on the stand provided. Place the stand on a table so that the pendulum is unobstructed as it swings from side to side. Record the length of the pendulum (from clamp to pendulum bob).  Pull the weighted end of the pendulum out to one side.  (Does it matter how far you pull it to one side?) Release the weight and time (with a stop watch) how long the pendulum takes to swing away from the release point and back to it 5 times.  Repeat this procedure for ten different pendulum lengths (pull the string through the clamp to shorten it).