Answer:
atom is the smallest unit of matter that has the characteristic properties of a chemical element.
Cs -137 has a half life of about 30 years. If 60 years pass, there is two half lives passed so 1/2 * 1/2= 1/4. Take 1/4 and multiply it with the mass given:
(1/4)*20mg=5mg left
Answer:
if the dependent and independent variable go up its direct but if one of them goes up and another goes down its indirect
Explanation:
for example the more mass an object has the less speed it has that's indirect but the less salt you add to water the less time you have to wait for it to boil
i hope this was useful
Temperature. Water is an example. When water is at room temp. its liquid. When water is at boiling temp. It is a gas. And when water is at freezing temp. Its a solid.
