A student approaches the outdoor staircase near Hope Commons, and takes a deep breath before attempting to climb all 30 stairs. At the bottom of the stairs, the student (61.8 kg) is moving at 2.00 m/s; at the top of the stairs the student is tired and only moving at 0.500 m/s. The top of the stairs is 7.50 meters higher than the bottom of the stairs. What is the change in mechanical energy

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?