## nilankshi 3 years ago A capsule of medicine is in the shape of a sphere of diameter 3.5 mm.how much medicine (in nm^3 )is needed to fill this capsule?

1. nilankshi

help mee plzz.....

2. phi

can you find the volume in cubic mm?

3. nilankshi

yes.

4. phi

1 cubic nm = 1 nm^3 = 1e^-27 m^3 1 mm= 1e-3 m and 1 mm^3 (cubic mm) = 1e-9 m^3

5. sasogeek

volume of a sphere is $\huge \frac{4}{3}\pi r^3$ diameter is 3.5, implying that radius is 1.75, substitute and u have a value in mm^3, then convert to nm^3

6. doncatch

22.458 mm^3

7. CoolTeen8572

What factors cause mechanical weathering? Explain why chemical weathering occurs faster in hot, wet climates than in cool, dry climates. What role does weathering play in the formation of soil? How did settlers on the Great Plains help create the Dust Bowl? Describe two techniques that farmers use to conserve soil.

8. phi

so I would do: $\frac{4}{3} \pi (3.5)^3 \cdot 10^{-9} m^3\cdot \frac{1 nm^3}{10^{-27} m^3}$

9. sasogeek

phi, the diameter is 3.5, not the radius... :|

10. phi

* 3.5/2

11. phi

tweaked $\frac{4}{3} \pi (3.5/2)^3 \cdot 10^{-9} m^3\cdot \frac{1 nm^3}{10^{-27} m^3}$