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1155 Measuring thumb thumb thumb thumb thumb
REACHING THE HORIZON
The distance to the horizon, in miles, is the square root of half again your height, in feet. If you're 6 feet tall, you can see 3 miles. From 600 feet, you can see 30 miles (sq. rt. of 900). Conversely, you can see a 150-foot building from 15 miles away (sq. rt. of 225).

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Dani Zweig, Pittsburg, Pennsylvania
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5586 Ages and Stages thumb thumb thumb thumb
PLUMBERS' AND PRINTERS' RULE OF THUMB
Never eat the last inch of your sandwich.
Randal Bundy, General Contractor, Oakland, CA, Randal Bundy
(1) Contributions from this contributor since (2015-07-08)
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5585 Driving
TRAFFIC LANES & SATETY
According to a Kentucky Transportation Dept. traffic study in 1980, an increase in the number of traffic lanes, results in a 10-30 percent decrease in traffic accidents across varying traffic flow densities.
Dave Agresti, Prof Criminology (retired), Tampa, Florida, United States
(90) Contributions from this contributor since (2008-04-15)
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5584 Tools thumb thumb thumb thumb thumb
SCREW ATTACHMENTS
Righty Tighty Lefty Loosey Except for ????
Brian Bickel, Endodontist, TX
(1) Contributions from this contributor since (2015-06-01)
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5582 Electricity thumb thumb thumb thumb thumb thumb thumb
CHOOSING A PULL-UP RESISTOR
When selecting a pull-up resistor to prevent a floating state, the general rule is to use a pull-up resistor that is an order of magnitude (1/10th) less than the input impedance of the input pin. For example, if you use a 1MΩ resistor for the pull-up and the input pin’s impedance is on the order of 1MΩ, the voltage on the input pin is going to be around half of ???, and the microcontroller might not register the pin being in a high state. Is it a high or a low? A resistance of 10k to 100kΩ for mygrmc should avoid most problems.
Joseph Bauer, Master Carpenter, Indian Hills, Ohio, USA
(41) Contributions from this contributor since (2008-01-08)
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5577 Health thumb thumb thumb thumb thumb thumb thumb thumb
RECOVERY FROM SURGERY
For every one hour that you spend in surgery, it generally takes one month to recover and feel back to normal.
Pam, Researcher, Orlando, FL, USA
(1) Contributions from this contributor since (2015-01-30)
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5576 Travel thumb thumb thumb thumb thumb thumb
HOLDING YOUR WATER
Men can hold their water twice as long as women. Plan your stops accordingly when traveling by automobile.
Alan
(1) Contributions from this contributor since (2015-01-19)
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5575 Health thumb thumb thumb thumb thumb thumb
CONFUSED ELDERLY
If your elderly parent is loopy or confused, check for a urinary tract infection.
Jeff Zurkow
(1) Contributions from this contributor since (2015-01-18)
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5574 Money thumb thumb thumb thumb thumb
RAINY-DAY SAVINGS
Experts say you should have 3-6 months saved for emergencies to cover all of your expenses. A simple way to determine this number is to take your monthly rent (or mortgage) payment and multiply by 12.
Doug Sweeney
(1) Contributions from this contributor since (2014-12-31)
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