A 2.1

A 2.1 What substances absorb UV radiation ?

4 5 6 7 8 9 10 11 What are your conclusions concerning : a) whether you can be sunburnt whilst swimming ? Yes – water does not absorb any relevant UV radiation

4 5 6 7 8 9 10 11 What are your conclusions concerning : b) the chances of getting tanned sitting in a south facing window on a sunny day? Yes – but only a quick fading tan

4 5 6 7 8 9 10 11 What are your conclusions concerning : c) the use of olive oil as a sunscreen ? Does not protect against the most damaging radiation

4 5 6 7 8 9 10 11 What are your conclusions concerning : c) the use of 4-aminobenzoicacidas a sunscreen ? Protects against the most damaging radiation

A 2.1

A 2.1

Presentation Transcript

2.1

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2.1 a and b

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Unit A- Section 2.1

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Output 2.1 产出 2.1

§ 2.1

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Example 2.1 A Conceptual Example

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AP Statistics: Section 2.1 A

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Figure 2.1 A recursive solution