What determines retention factor (Rf) ?

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community

Select the word from the list that best fits the definition a system made of 25 satellites