Question

2) Approximately how many rain drops fall on a one-acre lot during a one inch rain fall? Explain your reasoning and define any quantities you measure or estimated for your calculation. 3) The distance from the Sun to the nearest star is about 4x10^16m. The Milky Way galaxy is roughly a disk of diameter 10^21 m and thickness -10^19m. Find the order of magnitude of the number of stars in the Milky Way. Assume the distance between the Sun and its nearest neighboring star is typical.

Please help!!

Answer 1

V(the water deposited on 1 acre) = Number of drops X V(1 drop)

? Number of drops = V(the water deposited on 1 acre)

Answer 2

the "diameter" (in "number of stars wide")
10^21 / (4*10^16) = 2.5* 10^4 "stars"

area of disc = pi r^2 = 3.14* (1.25 *10^4)^2 =aprx 4.3 * 10^8 star-sq(in "number of stars-squared")

height = 10^19 / 4*10^16 = 2.5*10^2 stars high

volume = A*h = (4.3 * 10^8)*(2.5*10^2) = 10^11 stars

Answer 3

2)V(the water deposited on 1 acre) = Number of drops X V(1 drop)

? Number of drops = V(the water deposited on 1 acre)