A group of 3 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 a Lists & Spreadsheets page in a document on your TI-Nspire handeld device so that you can create a scatter plot for each lab (independent variable in column 1 and dependent variable in column 2). Also keep a paper record of your data pairs.
1. Bouncing Ball
The objective in this lab is to find a functional relation between bounce height and number of bounces (i.e. the height of each subsequent bounce after the ball is released from a certain height plotted against the bounce number).
Attach the CBR (Calculator-Based Ranger) to an Exit Sign (or other high object) in the hallway. Hold the large bouncy ball about 50 cms directly below the CBR. Release the ball and use the CBR to record the motion of the ball as it continues to bounce (see detailed instructions for setting up the Bouncing Ball experiment with the CBR2 and your TI-Nspire).
2. Balancing Pennies
The objective of this lab is to find a functional relation between the number of pennies balanced on one end of a meter stick and the point on the stick at which it balances.
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.
4. Light Intensity
The objective of this lab is to find a functional relation between the temperature of a cooling temperature probe and time that it takes to cool down after being placed in a beaker of hot water.
Use a temperature probe with your TI-Nspire 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.