Galileo and Scaling

# Galileo and Scaling

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## Galileo and Scaling

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1. Galileo and Scaling Physics 109

2. Imagine the earth a perfect sphere, with a rope just fitting around the equator. Another rope, 60 feet longer, is placed above the first rope, the same distance above it all the way around. How far above, approximately? • About one inch • About one foot • About ten feet

3. What fraction of the areaof a circle is occupied by another circle of half the radius? • one-quarter • One third • 1/π

4. How many solid spheres of diameter one inch are needed to balance one sphere of the same material of radius two inches? • 2 • 4 • 8

5. How much paint is needed to paint eight one-inch spheres compared to one two-inch sphere? • The same amount • Twice as much • Four times as much

6. The surface area of your lungs is approximately: • 5 square meters • 15 • 25 • 50 • 100

7. A flea the size of a man could jump about: • 1 meter • 10 • 100