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Half Life. The half-life of a quantity whose value decreases with time is the interval required for the quantity to decay to half of its initial value.

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Presentation on theme: "Half Life. The half-life of a quantity whose value decreases with time is the interval required for the quantity to decay to half of its initial value."— Presentation transcript:

1 Half Life

2 The half-life of a quantity whose value decreases with time is the interval required for the quantity to decay to half of its initial value.

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6 Half life Experiment Take 100 pennies and put them in a box Shake the box Take out all the pennies that are heads up Count them / graph it Shake the box Take out all the pennies that are heads up Count them / graph it continue until you run out of pennies

7 Half Life Experiment 2 T=0 100 pennies T=1 (1 st shake) T=2 (2 nd shake) T=3 (3 rd shake) T=4 (4 th shake) T=5 (5 th shake) T=6 (6 th shake) T=7 (7 th shake) T=8 (8 th shake) T=9 (9 th shake) T=10 (10 th shake) T=11 (11 th shake)

8 Graph of half life Time in trials PennIesPennIes

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