If you mix 100 grams of sugar into a 1,000ml beaker, and the sugar dissolves so you can no longer see it, how much sugar is in the beaker?

100g

Explanation:

The amount of sugar in the beaker still remains 100g. There is no addition or loss of any quantity of sugar unit.

Physical and chemical changes obey and complies with the law of conservation of matter.

The law suggests that matter is neither created nor destroyed but can be changed from one form to another.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.