Check
the variables for part of this experiment include whether or not the car hits the barrier and the distance that the
washers travel. use the drop-down menus to identify the independent and dependent variables.
the independent variable, the one that is intentionally manipulated, is
the dependent variable, the one that you measure the response in, is
an encounter with the barrier
the direction of the washer
the distance traveled by the washer
intro

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)

What are the constituent metals of stainless steel?

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.