2006-08-12 20:43:44 · 6 answers · asked by blah blah 1 in Science & Mathematics ➔ Chemistry
convection currents under the material being weighed will lighten the mass by providing an air cushion. If performing on a plastic scale can melt tray. If using a digital, small chamber balance you heat the air around causing the air pressure to decrease and the tare to be off.
Hopefully these answers aide you
2006-08-12 21:03:45 · answer #1 · answered by piercesk1 4 · 1⤊ 0⤋
Unless you're weighing something that contains a significant amount of air (that could conceivably create a "hot air balloon" sort of thing that would affect the weight), density isn't an issue--a pound of feathers is the same as a pound of iron; weight is weight. I'd be more worried about burning one's hands or damaging the scale.
2006-08-13 03:51:34 · answer #2 · answered by themikejonas 7 · 0⤊ 0⤋
they can be measured. weighed, yes. Measured, no. The mass (and essentially weight as long as were not messing with gravity), doesnt change based on temperature. Density (volume in this case specifically) is what changes, so as long as youre not measuring it volumetically (like by displacement), then youre fine.
2006-08-13 03:50:10 · answer #3 · answered by Kyle M 6 · 0⤊ 0⤋
Because they'd melt the plastic tray.
2006-08-13 03:49:24 · answer #4 · answered by Tuna-San 5 · 0⤊ 0⤋
It is hotter and therefore lighter....its not just air that becomes lighter. It is any material!
2006-08-13 04:00:53 · answer #5 · answered by Anonymous · 0⤊ 0⤋
their density isnt the same, wich could mess up your measurment.
2006-08-13 03:47:14 · answer #6 · answered by andrew b 2 · 0⤊ 1⤋