What causes the phases of the moon as observed from the earth? a) filtering of the light from the moon due to the earth's atmosphere. b) the tidal forces of the earth's oceans change the appearance of the moon. c) change in distance of the moon from the earth as it orbits in an elliptical orbit. d) the angle of light from the sun as it reflects off the moon and viewed from the earth's surface.

Which element is the least metallic between cadmium, silver, zinc, or iron?

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.

Determine the length of the object shown. 97.8 mm 97.80 mm 97 mm 98 mm