I think it’s the first one
A. anything less than 3.0 magnitude on a richters scale usually can't be felt by humans but instruments can pick it up.
Answer:
Explanation:
the directions may change
Or they will repel and become opposite sides
It will be 80 miles and it can be done only in 16 min
Answer:
A fair test.
Explanation:
Hi, a fair test is used to do scientifically valuable experiments, is a controlled investigation to answer a scientific question.
In a fair test two or more things are compared.
It consists in changing only one factor (the one bieng tested) and keeping all the other conditions the same during an experiment.
The factor is called a variable.