Water is placed in a piston-cylinder device at 20°c, 0.1 mpa. weights are placed on the piston to maintain a constant force on the water as it is heated to 400 °c. how much work does the water do on the piston, per unit mass? sketch the p-v diagram. (this question requires access to thermodynamic tables). (w = 310.2 kj /kg]

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.

What are the advantages of using the metric system? designed as a decimal system making conversions simpler more accurate system of measurement has prefixes that correspond to an amount to use with all base units used by the entire scientific community

Is water wet? my friends are debating.