Galileo and Scaling
Physics 109
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?
A. About one inch
B. About one foot
C. About ten feet
What fraction of the area
of a circle is occupied by
another circle of half the radius?
A. one-quarter
B. One third
C. 1/π
How many solid spheres of diameter one inch are
needed to balance one sphere of the same
material of radius two inches?
A. 2
B. 4
C. 8
How much paint is needed to paint eight one-inch
spheres compared to one two-inch sphere?
a. The same amount
b. Twice as much
c. Four times as much
The surface area of your lungs is approximately:
A.
B.
C.
D.
E.
5 square meters
15
25
50
100
A flea the size of a man could jump about:
A. 1 meter
B. 10
C. 100