A nurse is reviewing evidence for a new heartburn prevention…

A nurse is reviewing evidence for a new heartburn prevention medicine. One piece of evidence is a study in which participants were assigned to the experimental group or control group based on whether their participant number was odd or even. Neither the participants nor the researchers knew which participants were in which group. The nurse is reviewing what type of evidence?

A rock climber with a mass of 68 kg is moving along a vertic…

A rock climber with a mass of 68 kg is moving along a vertical rope on a cliff. If the climber ascends at a constant speed, what is the tension in the rope? If the climber descends and accelerates downward at , what is the tension in the rope? (Take . Neglect air resistance.)