© Department of Physics, University of Guelph
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1. A taxidermist has to mount two similarly
shaped fish, of mass 8.0 and 27 kg. How many times longer than the short
one is the long one?
2. Two steel spheres are to be painted. One
has 8 times the mass of the other. What is the ratio of the amount of paint
required to cover the large one to the amount required to cover the small
one? Note that since the spheres have the same density, the larger one
must be 8 times the volume of the smaller one. The paint layer would have
the same thickness on both spheres.
3. Suppose one developed a "super-cow" having a body mass (excluding
the contribution of the legs) 4.0 times that of a normal cow. In order
to provide the same relative support,
(a) how much larger would the cross-sectional
area of super-cow's legs have to be?
(b) how much larger would the leg diameter
have to be?