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Hole - PowerPoint PPT Presentation


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Jasmine and William each owned a box called B-box. Each box contained B gas molecules which are represented in blue. . Each B molecule moves independently in a random manner and is able to escape through a hole in the box. B molecule. Hole. Escaping B molecules. B-box.

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Presentation Transcript
slide1

Jasmine and William each owned a box called B-box. Each box contained B gas molecules which are represented in blue.

Each B molecule moves independently in a random manner and is able to escape through a hole in the box.

B molecule

Hole

Escaping

B molecules

B-box

jasmine and her b box
Jasmine and her B-Box

Jasmine had 800 million B molecules in her B-box initially. She noticed that it took 1 minute for the quantity of B molecules in her box to decrease from 800 million to 760 million.

1 minute

800 million molecules

760 million molecules

william and his b box
William and his B-Box

William had 2000 million B molecules in his B-box initially. William’s B-box was similar to Jasmine’s box in every way except for the initial number of B molecules present in the box.

2000 million molecules initially

William’s B-box

800 million molecules initially

Jasmine’s B-box

william s prediction
William’s Prediction

Based on Jasmine’s results, the number of B molecules in my B-box will decrease by 40 million from 2000 million to 1960 million after 1 minute.

william s prediction vs actual results
William’s Prediction vs Actual Results

To William’s shock and dismay, the number of molecules in his B-box actually decreased by 100 million from 2000 million to 1900 million after 1 minute.

Actual Result

Predicted Result

1 minute

1960 million molecules

1900 million molecules

2000 million molecules

jasmine s result in the second minute
Jasmine’s result in the second minute

William took a closer look at Jasmine’s results and realized that for the second minute, the B molecules in Jasmine’s B-box decreased to 722million.

1 minute

1 minute

722 million molecules

800 million molecules

760 million molecules

slide7

Your Challenge for the day

  • Explain why B molecules in William’s B-box decreased by 100 million after 1 minute.
  • From your explanation, predict how B molecules in Jasmine’s and William’s boxes will decrease in subsequent minutes.
  • Identify some patterns or characteristics in the way B molecules decreases.
  • Hence, predict the outcome in practical situations where a similar type of change occurs.