I FINALLY figured it out! The OHaus scale I was using had a 200 gram limit and when I tared the 115 gram beaker back down to 0 grams, I exceeded the limits of the scale! I used a 5000 gram scale, and it added up to 200 g. Phew! I was SO perplexed. I was even asking my science colleagues how...
Today I was leading my students in an experiment that would reveal "the rule for what floats." We had previously floated (or sank) various objects in regular, room temperature tap water. I then weighed out 100 grams each of sugar and water, mixed them together and weighed them again. To my...