Answer:
Repeated
Explanation:
An experiment must be done multiple times to prove its validity.
hope this helps- Cam ♡
The answer to this question is:
D) Disorder
Consider two variables said to be "inversely proportional" to each other. If all other variables are held constant, the magnitude or absolute value of one inversely proportional variable decreases if the other variable increases, while their product (the constant of proportionality k) is always the same.
Explanation:
Work cannot be increased by using a machine of some kind.