Control groups are useful in scientific experiments because they (1 point) Are easily identified by the experimenter during the investigation.
Are cheap and relatively easy to maintain throughout the experiment.
Prevent the data collection from being contaminated by other variables.
Provide a standard for comparison with the data collected in the investigation,

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?