Half Life

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# Half Life - PowerPoint PPT Presentation

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. . Half life Experiment. Take 100 pennies and put them in a box Shake the box Take out all the pennies that are heads up

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## PowerPoint Slideshow about 'Half Life' - marcie

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Presentation Transcript

### 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.
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
Half Life Experiment 2
• T=0  100 pennies
• T=1 (1st shake) 
• T=2 (2nd shake) 
• T=3 (3rd shake) 
• T=4 (4th shake) 
• T=5 (5th shake) 
• T=6 (6th shake) 
• T=7 (7th shake) 
• T=8 (8th shake) 
• T=9 (9th shake) 
• T=10 (10th shake) 
• T=11 (11th shake) 
Graph of half life

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0

PennIes

0 1 2 3 4 5 6 7 8 9 10 11 12

Time in trials