How Is the Mass of Each Hailstone Calculated?

[omc1]

Homework Statement

During a violent thunderstorm, hail the size of marbles (diameter = 2.2 cm) falls at a speed of 36 m/s. There are estimated to be 40 hailstones per cubic meter of air. Assume that, as for ice, 1 cm3 of hail has a mass of 0.92 g. What is the mass of each hailstone?

Homework Equations

volume of a sphere

The Attempt at a Solution

(4∏r^3)/3=5.58 x 0.92=5.13g x 40 stones=205.17g its not right for some reason even tho i used this number to solve the next problem and got that one right ...

 

[tiny-tim]

hi omc1!

What is the mass of each hailstone?
…
(4∏r^3)/3=5.58 x 0.92=5.13g x 40 stones=205.17g

erm … each hailstone!

 

[omc1]

oh duh!

 

[tiny-tim]

he he