Ruler
A ruler, sometimes called a rule or line gauge, is an instrument used in geometry, technical drawing, printing, engineering and building to measure distances or to rule straight lines. The ruler is a straightedge which may also contain calibrated lines to measure distances.
Types
Rulers have long been made of different materials and in a wide range of sizes. Some are wooden. Plastics have also been used since they were invented; they can be molded with length markings instead of being scribed. Metal is used for more durable rulers for use in the workshop; sometimes a metal edge is embedded into a wooden desk ruler to preserve the edge when used for straight-line cutting. 12 inches or 30 cm in length is useful for a ruler to be kept on a desk to help in drawing. Shorter rulers are convenient for keeping in a pocket. Longer rulers, e.g., 18 inches (45 cm) are necessary in some cases. Rigid wooden or plastic yardsticks, 1 yard long and meter sticks, 1 meter long, are also used. Classically, long measuring rods were used for larger projects, now superseded by tape measure or laser rangefinders.
One percent
One percent (or 1%) may refer to:
Groups of people
Entertainment
Other uses
68–95–99.7 rule
In statistics, the so-called 68–95–99.7 rule is a shorthand used to remember the percentage of values that lie within a band around the mean in a normal distribution with a width of one, two and three standard deviations, respectively; more accurately, 68.27%, 95.45% and 99.73% of the values lie within one, two and three standard deviations of the mean, respectively. In mathematical notation, these facts can be expressed as follows, where x is an observation from a normally distributed random variable, μ is the mean of the distribution, and σ is its standard deviation:
In the empirical sciences the so-called three-sigma rule of thumb expresses a conventional heuristic that "nearly all" values are taken to lie within three standard deviations of the mean, i.e. that it is empirically useful to treat 99.7% probability as "near certainty". The usefulness of this heuristic of course depends significantly on the question under consideration, and there are other conventions, e.g. in the social sciences a result may be considered "significant" if its confidence level is of the order of a two-sigma effect (95%), while in particle physics, there is a convention of a five-sigma effect (99.99994% confidence) being required to qualify as a "discovery".
Powerhouse
Powerhouse or Power House may refer to:
Places
Business
Powerhouse (comics)
Powerhouse is a name used by several different fictional characters, operating in the Marvel Comics Universe.
Powerhouse (Rieg Davan)
Publication history
Powerhouse first appeared in Nova #2 (October 1976), and was created by Marv Wolfman, John Buscema, and Joe Sinnott.
The character subsequently appears in Nova #6-8 (February-April 1977), #10-11 (June-July 1977), #24-25 (March & May 1979), Fantastic Four #206 (May 1979), #208-209 (July–August 1979), and ROM #24 (November 1981).
Powerhouse appeared as part of the "Champions of Xandar" entry in the Official Handbook of the Marvel Universe Deluxe Edition #16.
Fictional character biography
Powerhouse is a member of Xandarian alien race, with superhuman strength and the ability to absorb energy from any source to temporarily enhance his physical strength fiftyfold, absorb the energy from a weapon used against him and redirect it against an assailant, and even create a psionic link with an opponent with whom he is in physical contact so as to control his opponent's use of his or her own powers.
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