When both distance and direction are considered, motion can be represented by a
What? A)circle B)vector C)letter D)scalar

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

Which of the following is a physical property flammability heat of combustion solubility and toxicity

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.