Which helps identify the law of gravity as a law? In his experiments at the Tower of Pisa, Galileo found that gravity accelerates all objects at the same rate.
It states that gravity is a force of attraction that exists between any two objects in the universe.
It is based on scientific observations made by several different scientists over hundredths of years.
It explains how the masses of two objects and the distance between them determine the exact amount of the fom

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them  

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms