Each data point can be viewed by moving your mouse through the chart. The vertical bars below the chart represent Volume and are color-coded to indicate market activity for the day: An up day (where the price is greater than the previous price) will show a green bar. A down day (...
Alternating current thus pulses back and forth within a conductor without the charge moving any net distance over time. The time-averaged value of an alternating current is zero, but it delivers energy in first one direction, and then the reverse. Alternating current is affected by electrical ...
And then there's the filter. Christine O'Sullivan, whose family owns a moving company in Michigan, hadn't known about Yelp until she noticed the negative reviews people had been leaving on it. When she realized there were positive reviews that had been submitted but weren't appearing, "I ...