A certain type of rice has an average grain length and diameter of 6 mm and 2 mm, respectively (assume that a grain has a form of a cylinder). One cup of this rice, after being cooked, contains about 795 food calories. Assume the cup volume is 280 cm3.
Part A
How many grains are there in 1 cup of rice? Assume perfect packing of the grains of rice (no unoccupied volume in the cup).
Express your answer using one significant figure.
N =
Part B
How many calories are there in one grain?
Express your answer using one significant figure.
E =
Cal/grain
Part C
How many cups of uncooked rice are needed to provide 2000 food calories to each of four adults?
Express your answer using three significant figures.
n=
cups