It is one thing to read about a tire rotating at a specified number of revolutions per second. It is another to be able to visualize it. When you add lights to bike tires and film at dusk you slow things down enough to make sense of the question. How fast is the bicycle going? [...]
You have to love people who make lemonade from lemons. A recent photo circulating in FaceBook made me envious, for just a fraction of a second, of the people in Boston who are dealing with the historic snow falls of the 2014-2015 winter. Snow Pit, South Boston, MA. 2015. Courtesy Bill McKay The [...]
The National Retail Foundation sends out press releases that outline their predictions for consumer spending each holiday season. The 2007 - 2009 recession is quite evident in the dips in the charts of the predictions. Some economists argue that due to unemployment and under-employment Americans have not yet fully recovered from the effects of the [...]
Medical studies have proven the placebo effect is real. Patients who are treated with a placebo often have a change in symptoms for the better. When a patient develops the side effects of the treatment they think they are receiving, it is the opposite - the nocebo effect. While reading The contageous thought that could [...]
Texas Instruments has dominated the graphing calculator market since the TI-81 debuted in 1990. Despite the fact that many free graphing calculator apps for smart phones and tablets are more than capable of performing the same tasks, the calculators stubbornly hold their market share. The advantage lies in the fact that many TI calculators are [...]
The release of the 2015 Sports Illustrated swimsuit edition often brings controversy of some sort. This year's inclusion of a plus-size model does not disappoint. Is it an about face that recognizes that women come in all shapes and sizes or an effort to boost revenue for a flailing industry? MPA The Association of Magazine Media publishes [...]
Low Tide Versus High Tide These images show low tide and high tide on January 19, 2011 near the Golden Gate NOAA tide gauge in the San Francisco Bay. The question is, is this normal or is there cause for concern? Data from the tide gauge for this time frame is available from the [...]
Materials: Compass, ruler, paper, string, Geometer’s Sketchpad. Activity 1: Open your compass approximately 2 inches and construct a circle. Without changing the opening of your compass, mark off equal lengths around the outside of the circle. Draw segments between consecutive marks on the circle. What type of figure have you constructed? _____________________ Do the last [...]
https://www.youtube.com/watch?v=LXhADp-KPg8 When graphing the absolute value function, create a t-chart and list values for x. Then plug those values into the equation to find y. Be sure to treat the absolute value like a parenthesis and perform the order of operations using it as a grouping symbol. Anything within the absolute value is performed first. Once [...]
