Question

1. how is experimental uncertainty related to precision. if an instrument is listed to have an uncertainty of (±0.1 g) and another is (±0.001 g). which instrument is more precise? 11. explain how the law of conservation of energy applies to electrical production in a coal plant. 12. explain how the state of matter relates to the amount of energy a substance has.

Explanation:

Question 10

Experimental uncertainty is inversely related to precision. Lower uncertainty means higher precision. The instrument with an uncertainty of (±0.001 g) has a smaller uncertainty range compared to the one with (±0.1 g).

In a coal - plant, coal's chemical energy is first converted to heat energy by combustion. This heat energy is used to heat water and produce steam. The steam's kinetic energy drives a turbine, which is connected to a generator. The generator converts the mechanical energy of the turbine into electrical energy. Throughout this process, energy is conserved as it just changes from one form to another.

The state of matter is related to the amount of energy a substance has. Solids have the least amount of energy as the particles are closely packed and have limited movement. Liquids have more energy than solids as the particles can move more freely. Gases have the most energy as the particles are far apart and move randomly at high speeds.

Answer:

The instrument with an uncertainty of (±0.001 g) is more precise.

Question 11