19685 because 1 km in inches is 39370 approximately so you just have to cut it in half
Since metals are malleable they are able to be bent and shaped.
Explanation:
Gas mask filters include activated carbon,
absorbents that trap toxins in millions of micro-pores. It is the same compound used to filter water and treat ingestion of poisons. The activated carbon traps the toxins, but in gas masks it is further augmented with metal oxides, such as copper and molybdenum, to help break down the toxins.
A lot of research is being done in Berkeley labs
After first half-life you will have 100/2=50g. After second half-life you will have 50/2=25g.
Becauze were made of LOTS of atoms actually ECERYTHING EVEN AIR is made of atoms
