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Physics Lab Experiment on Absorption of Heat

PURPOSE
This experiment was designed to understand the absorption of heat.

Equipment Setup
1 glass container
4 sheets of acetate paper
Thermometer
100 W light bulb
Graph paper

Wrap one sheet of acetate paper around a clear glass container. Place a thermometer in the glass containers and bring the 100 W light bulb (no lamp shade) to a distance of about 20 cm from the glass container.

Procedure
Record the temperature in the container before the light bulb is turned on. Then turn on the light bulb and take another temperature reading every 5 minutes for 45 minutes.

Repeat the same procedure for the other three sheets of acetate paper, but be sure to allow the thermometer to return to room temperature before you start taking new readings.

Analyzing the Data
1. Using the graph paper, make a plot of temperature (vertical axis) vs. time (horizontal axis) for each of the glass containers. One plot per graph paper please! Be sure you are neat and following the graphing strategies provided with written assignment one. You will hand these graphs in with this written assignment.

2. Now explain your results below. What Conclusions can you reach about the use of colored glass in buildings? In greenhouses? After completing the experimental procedures, make a report for each experiment.

Solution This solution is FREE courtesy of BrainMass!

At-Home Experiment 2

PURPOSE
This experiment was designed to understand the absorption of heat.

Equipment Setup
1 glass container
4 sheets of acetate paper
Thermometer
100 W light bulb
Graph paper

Wrap one sheet of acetate paper around a clear glass container. Place a thermometer in the glass containers and bring the 100 W light bulb (no lamp shade) to a distance of about 20 cm from the glass container.

Procedure

Record the temperature in the container before the light bulb is turned on. Then turn on the light bulb and take another temperature reading every 5 minutes for 45 minutes.

Repeat the same procedure for the other three sheets of acetate paper, but be sure to allow the thermometer to return to room temperature before you start taking new readings.

Data: Column 1 is time in minutes and columns 2, 3, 4 and 5 are temperature measurements inside the glass container with 1, 2, 3, and 4 acetate papers wrapped around the glass container respectively.

0 18.6 17.1 18.5 18.3
5 22 20 19.8 19.5
10 24 22.5 21 20
15 24.9 22.9 21.5 20.4
20 25.1 23 22.1 21
25 25.9 23.5 22.5 21.3
30 26 24.5 23 21.5
35 26.1 25 23.1 21.8
40 26.5 25.8 23.4 21.9
45 26.6 25.9 23.8 22

Following graph shows the data for all 4 experiments plotted in one graph.

Analyzing the Data

1. Using the graph paper, make a plot of temperature (vertical axis) vs. time (horizontal axis) for each of the glass containers. One plot per graph paper please! Be sure you are neat and following the graphing strategies provided with written assignment one. You will hand these graphs in with this written assignment.

2. Now explain your results below. What Conclusions can you reach about the use of colored glass in buildings? In greenhouses? After completing the experimental procedures, make a report for each experiment.

Temperature inside the glass container increased with time. When more acetate paper was used temperature values increased. Colored glass used in buildings and greenhouses can have the same effect as we observed in this experiment. They can help keep the interior warm.

Report:

Initially, 100 W bulb was kept about 20 cm away from the glass container. It took long to see a change in temperature. I had to place the bulb about 10 cm away from the glass container. It was observed that the temperature inside the glass container slowly rose with time. Experiment was repeated with 2, 3 and 4 acetate papers wrapped around the glass container.

The glass container was allowed to reach room temperature before each trial. As the number of acetate paper was increased, the rate of increase of interior temperature dropped. This is due to the reflection of more heat off the acetate papers. Using colored glasses in buildings and green houses, help trap the heat, since darker colors absorb more heat compared to lighter/white colors.