. Elementary physics and chemistry: first stage. Science. DENSITY. 47 loo cubic centimetres of water into the glass vessel, and find the mass of the water in grams. Determine the mass of one cubic centimetre by dividing this number by loo. It will be found that the mass of one cubic centimetre is one gram very nearly. It would be exactly if the water were at a certain temperature. A convenient way to add or take away small quantities of liquid is by means of a pipette, used as shown in Fig. 32. Counterpoise a pint measure or bottle with some sheet lead. Fill the bottle with water, and place ir
. Elementary physics and chemistry: first stage. Science. DENSITY. 47 loo cubic centimetres of water into the glass vessel, and find the mass of the water in grams. Determine the mass of one cubic centimetre by dividing this number by loo. It will be found that the mass of one cubic centimetre is one gram very nearly. It would be exactly if the water were at a certain temperature. A convenient way to add or take away small quantities of liquid is by means of a pipette, used as shown in Fig. 32. Counterpoise a pint measure or bottle with some sheet lead. Fill the bottle with water, and place iron weights in the opposite pan to balance it. Notice that the size of the iron is much less than the size of the pint of water. ^1000 #-900 ^100 S-(00 l^». Fig. 31. — Measuring jar, graduated in cubic centimetres. Fig. 32.—How a pipette is used. REASONS AND RESULTS. The Meaning of Density.—In an earlier lesson an explana- tion was given of the meaning of the word dense, and lead was mentioned as an example of a dense substance. You must now learn more exactly what the word dense, or density, means. If different solids are obtained, of the same size or volume, every boy knows that they will have different masses. Suppose,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gregory, R. A; Simmons, A. T. London: MacMillan
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