All of the answers would be correct,
hope this helped!! <span />
Years would be the independent variable because any sort of time is usually the independent variable.
Teperature
Ph level
Substrate concentration
Not sure if these are physical but hope it helped.
Answer:
If you have something like an endoscope except controlled remotely doctors and healthcare workers could in essence use it as a sort of reconnoissance tool for diagnosing injuries and illnesses.
Explanation:
Im pretty sure its 20,000-25,000
