The graph shows the results of an experiment in which the distance travelled by an object was measured against the time travelled for.

using the information above, answer these 3 questions.

a) comment on the shape of the graph drawn for the plotted results.

b) is it possible to decide whether the plotted results are valid? provide a reason for your answer.

c) describe the motion of the object used to do this experiment based on the plotted points. justify your answer.

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.