A person uses a pulley to raise a flag up a 15 meter flagpole. The weight of the flag is 45 Newtons. The person pulls down on the rope with a force of
50 Newtons through a distance of 15 meters.

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

What is the percentage of hydrogen in nitrogen trihydride