1. Galileo and Scaling
Physics 109

2. About one inch About one foot About ten feet
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. one-quarter One third 1/π
What fraction of the area of 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. The same amount Twice as much Four times as much
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