1. Think Tank 

If the area of the floor of a tank is six square feet, and the tank contains 9 inches of water, how much does the water level rise if a 1 foot cube is placed in the tank? How much farther would it rise if another identical cube is added?

2. Close Proximity 

An automation vendor has been packaging their proximity sensors in boxes of 160 sensors for years. These small cylindrical parts are typically stacked in 8 rows of 20 sensors each to perfectly fill the boxes. With sales increasing, and production ramping up, the vendor realizes that it may be possible to increase the number of sensors in each box, without changing the box size. How do they do it, and how many more sensors will fit in each box?

3. What’s Wrong Here? Can You Spot All the NEC Code Violations?


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Reprinted with permission 

Hint: The 72-hour shunt

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Doc, It Hurts When I Do This

Recently, my co-worker and I went to lunch at our favorite local wing and burger dive. This “restaurant” is the sort of place that is not at all concerned with health rating standards and employees seem to pride themselves on the sticky tables and floors.

We enjoyed our typical artery-clogging fare, a greasy burger with French-fries, and were about to settle the bill when my co-worker began to have a violent coughing fit (probably a result of some soft drink down the windpipe). Concerned about him, I quickly checked to make sure he was okay.

Convinced the Heimlich maneuver was unnecessary (mouth-to-mouth was out of the question) I left him alone since he did not attempt to display the universal choking sign and eventually, with teary-eyes, assured me he was all right. We paid our bill and headed back to the office.

Later that day, I asked him how he was feeling. He replied that he did not feel well at all and that his chest and lungs hurt. I attempted to offer some reassurance that he was okay by suggesting it was probably just a muscle pull from his earlier coughing fit.

The following day he arrived to work a little later than usual, stating that he had been to the doctor because of his chest pains. Naturally, I was concerned and anxious to hear about the results of his visit, especially considering our shared un-healthy diet and non-active lifestyles.

In a tone that could have been mistaken for concern, my co-worker reported on the doctors findings. Complete x-rays, a total blood workup and numerous other tests all confirmed there was nothing seriously wrong with him. A routine set of follow up questions included, “Have you participated in any unusual physical activity within the past several days?”

A moment of brief thought later, he remembered the unusual physical activity he had participated in two days prior. The embarrassing realization he came to caused him to chuckle aloud (reminding him of the pain in his chest). Two days earlier Santa had sleighed in a Nintendo® Wii™ for his two boys. In an effort to test the product for quality and reliability, my co-worker boxed his sons on the Wii for several hours.

If the greatest game of your childhood involved watching two paddles return a ball back and forth on a black screen then maybe you should heed the warnings of the Wii and read the 16 pages of safety information included in the manual. Video games are cool and appeal to the child in us, but can be addictive and cause embarrassing injuries.