Simple Nature - Light and Matter

(Martin Jones) #1
incorporate this effect, and find the resulting change in the fall time
in the case of a 21 g ball of radius 1.0 cm, falling from a height of
1.0 m. The density of air at sea level is about 1.2 kg/m^3. Turn in a
printout of both your program and its output. Answer: 0.34 ms.

41 The factorial of an integern, writtenn!, is defined as the
product of all the positive integers less than or equal ton. For
example, 3! = 1× 2 ×3 = 6. Write a Python program to compute the
factorial of a number. Test it with a small number whose factorial
you can check by hand. Then use it to compute 30!. (Python
computes integer results with unlimited precision, so you won’t get
any problems with rounding or overflows.) Turn in a printout of
your program and its output, including the test.
42 Estimate the kinetic energy of a buzzing fly’s wing. (You may
wish to review subsection 0.2.3 on order-of-magnitude estimates.)


43 A blade of grass moves upward as it grows. Estimate its
kinetic energy. (You may wish to review subsection 0.2.3 on order-
of-magnitude estimates.)

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Problems 127
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