Unit 3 codes for insertion in webpages

03Green1.gif
Note: You can click on the graph to enlarge it. Then close the window to return here.

Greenhouse data

03Green2.gif
Year Temperature rise (°C) Greenhouse graph
0 0
20 0.01
36 0.02
40 0.03
50 0.04
60 0.06
70 0.08
80 0.1
90 0.13
100 0.18
110 0.24
120 0.32

Excel link
To see how you can use Excel to find such best fit approximate models, click here to go to Excel activity.
Excel should open in a new browser window. Here is an alternative link:

Greenhouse prediction
The graphs of the different approximate models are shown in this applet. To see how these different models predict the future differently, let's extrapolate the data: change the xmax to 220 and the ymax to 8 and press ENTER on the keybord, or click the Set Limits button ... Can you see from the graphs what temperature increase each model predicts by the year 2020 and by the year 2080? Which model do you think makes the best prediction?

Greenhouse prediction popup of above
The graphs of the different approximate models are shown in this applet. To see how these different models predict the future differently, let's extrapolate the data: change the xmax to 220 and the ymax to 8 and press ENTER on the keybord, or click the Set Limits button ... Can you see from the graphs what temperature increase each model predicts by the year 2020 and by the year 2080? Which model do you think makes the best prediction?

CALCULATOR prediction
We can also use the algebraic formulae for the different models to calculate predicted values. Enter values in this automatic calculator to check the models and to make predictions. (Note that the display is updated continuously.)

CALCULATOR prediction popup of above
We can also use the algebraic formulae for the different models to calculate predicted values. Click the button below to open the programmed Temperature Calculator. Enter values for x (years) to check the models and to make predictions. Note that the display is updated continuously. To close the calculator, click the button again, or click the X in the top-right corner of the calculator window.

ICING CALCULATOR
Method 1: Numerically
Use the Surface Area Calculator below ....

ICING CALCULATOR popup of above
Method 1: Numerically
Click the button below to open the programmed Surface Area Calculator.

ICING
Method 2: Graphically
Use the graph below to find the value of x that will give the smallest Surface Area.
Click here for help on using the graph. WE- this is a working link!

ICING popup of above
Method 2: Graphically
Click the button below to open the Surface Area Graph. Use the graph to find the value of x that will give the smallest Surface Area. Click here for help on using the graph. WE- this is a working link!

Icing with calculus

Sorry for you!

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