What word is used describe knowledge about the universe and the method of obtaining that knowledge

answer; polycythemia is the correct answer;

a chair, a bed, and a toothbrush

explanation:

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy