Which of the following processes would be the closest to reversible? A. a book that slides across a rough carpeted floor
B. hot water that is forced through a pipe at high velocity
c. a fan that operates at high speed pumping hot indoor air into the surrounding environment outside
D. a piston that expands slowly against a well-greased metal cylinder

How well does the extrapolated value (the slope of the trend line) agree with the accepted value of free-fall acceleration (g = 9.8 m/s2)?

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.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?