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The Main Rules Collection (5130)
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2835
Driving
THE TRAFFIC RULE OF 85
Traffic engineers have found that 85 percent of drivers will spontaneously drive at or below the safe speed, given ideal conditions (light traffic, dry pavement.) They will often clock traffic for awhile and use this rule to establish the speed limit.
Tom Nelson, Photographer, Boston, MA, USA
(EC)
Collected by The Editors
Current Rating:
5.1
out of
10
based on
16
reviews
Comments (2)
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2836
Driving
FINDING A SAFE FOLLOWING DISTANCE
Forget calculating car lengths. The safe following distance for a car is 2 seconds behind the vehicle in front of you (assuming dry pavement.) Figure from the time that the back of the car ahead passes a shadow or crack on the road to the time the front of your car reaches it. This rule is self-adjusting for speed.
Tom Parker, Editor, Lansing, New York, USA
(2860)
Contributions from this contributor since (2007-01-01)
Current Rating:
7.1
out of
10
based on
17
reviews
Comments (3)
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2838
Entertaining
MINIMUM NUMBER OF COCKTAIL PARTY GUESTS
Cocktail parties should have at least 12 guests. With fewer guests, the party becomes one conversation in which only one person speaks at a time. At about 12 persons, the conversation splits into two or more groups with more chance for interplay and movement.
Tom Nelson, Photographer, Boston, MA, USA
(EC)
Collected by The Editors
Current Rating:
7
out of
10
based on
15
reviews
Comments (0)
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2839
Driving
FINDING A PARKING SPACE
Unless the entrance is physically blocked, a parking ramp flashing it's "full" sign, isn't.
Owen T. Anderson, Magician, Hamilton, ON, Canada
(EC)
Collected by The Editors
Current Rating:
5.1
out of
10
based on
17
reviews
Comments (1)
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2840
Children
EVALUATING KID'S SPEECH
A child whose speech and intelligence are developing normally will say as many words per utterance (plus or minus one) as his or her age in years - e.g. a child of about 1 should be starting to make one-word utterances, a child nearing two should be starting to put two words together, etc.
Kate Gladstone, Brooklyn, NY, USA
(EC)
Collected by The Editors
Current Rating:
5.7
out of
10
based on
16
reviews
Comments (1)
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2841
Astronomy
FINDING A FULL MOON
Full moons will be in the south around midnight. Before midnight, they will be more and more in the direction of sunrise; after midnight, they'll be more and more in the direction of sunset - true for both hemispheres.
Kate Gladstone, Brooklyn, NY, USA
(EC)
Collected by The Editors
Current Rating:
6.3
out of
10
based on
16
reviews
Comments (3)
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2842
House and Home
SHARPENING A KNIFE
To get a thirty degree angle on a knifeblade (good for many kinds of work) grind it so that the breadth of the exposed diagonal cutting-edge is twice the thickness of the blade.
Kate Gladstone, Brooklyn, NY, USA
(EC)
Collected by The Editors
Current Rating:
7.1
out of
10
based on
16
reviews
Comments (2)
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2843
Driving
TURBO CHARGED CAR MILEAGE
A turbocharged car gets about ten percent better overall miles per gallon than a regular car of the same size and horsepower.
Lawrence A. Howe, Mechanical Engineer, Annapolis, MD, USA
(EC)
Collected by The Editors
Current Rating:
6.5
out of
10
based on
16
reviews
Comments (1)
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2844
Design
RULE OF THUMB USED BY JAPANESE ELECTRONICS DESIGNERS
An American finger is the same size as a Japanese thumb.
Erik Nelson, Boston, MA, USA
(EC)
Collected by The Editors
Current Rating:
4.8
out of
10
based on
16
reviews
Comments (1)
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2846
Real Estate
ESTIMATING AN ACRE
An acre is about the size of a football field without the endzones.
Kevin Williams, Austin, TX, USA
(EC)
Collected by The Editors
Current Rating:
7.2
out of
10
based on
14
reviews
Comments (4)
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2847
Grooming
DRESS FOR SUCCESS
White makes you look larger. Black makes you look thinner. Orange makes you look … orange.
Boden Day, Former Army Journalist, Newark, DE, USA
(EC)
Collected by The Editors
Current Rating:
8.1
out of
10
based on
19
reviews
Comments (1)
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