Hydrogen and oxygen are being formed if an <span>electric current is passed through water and bubbles start forming.
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The energy of the ski lift at the base is kinetic energy:

where m is the mass of the ski lift+the people carried, and

is velocity at the base.
As long as the ski lift goes upward, its velocity decreases and its kinetic energy converts into potential energy. Eventually, when it reaches the top, its final velocity is v=0, so no kinetic energy is left and it has all converted into gravitational potential energy, which is

where

and h is the height at the top of the hill.
So, since the total energy must conserve, we have

and so

from which we find the height:
A Framework for K–12 Science Education: Practices, Crosscutting Concepts, and Core Ideas (Framework) recommends science education in grades K–12 be built around three major dimensions: science and engineering practices, crosscutting concepts that unify the study of science and engineering through their common application across fields, and core ideas in the major disciplines of natural science.
The best logical answer is A