Question

1. A blueberry pancake has a diameter of 15 cm and contains 6 blueberries, each with a dimeter of 1 cm. a) Find the cross section of a blueberry and b) the 'target' density (nar) of berries in the pancake (as seen from above). What is the probability that a skewer jabbed at random into the pancake will bit a berry c) in terms oro and ntar and d) numerically.

Answer 1

Answer: Probability can be easily found by examining the areas By definition P-ntar . ơ, but we also know. 6'1 where d 1 cm and D 15 cm. So now, we see that scattering cross section is ơ-1 ) , because. by definition Now, lets plug in the numbers: 6d2 6.1 6 -DT-15T-225 2.67% Ntar .σ.A Generally, probability is given by: ntar σ . A