In order to safely run a sample in a centrifuge, it is important to Select one: a. balance the sample with a counterweight of the same mass directly across from it. b. make sure the sample is free from impurities. c. ensure that the sample fills the centrifuge tube completely. d. do all of the given tasks.

Option (b) is the correct answer.

Explanation:

A laboratory device which is used to separate fluids, gases or liquid on the basis of their density is known as a centrifuge. When a vessel containing the sample is spins at a high speed then separation takes place as the centrifugal force pushes the heavier material out of the vessel during this process.  

So, if we want the sample to safely run through the centrifuge then it is important that it should be free from impurities.

Thus, we can conclude that in order to safely run a sample in a centrifuge, it is important to make sure the sample is free from impurities.

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