The radioisotope actinium-225 has a half-life of 10 days. i begin with 16 kg of this isotope, how much will remain after 40 days?

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what