What is commensurable?

Measureable in terms of same units.  For example, a 20 centimeter length is commensurable with 1 meter length as both can be measured in centimeters, but the length of a side and that of a diagonal of a square are not commensurable.

What is Greenwich Mean Time?

The sun transits through all points on a meridian, hence every point on an E-W line has different noon time, which gives the local time. The earth may be thought as divide in zone each with a standard time based on the local time of some meridian crossing the zone. Thus, each hour cover a time extending across 150 of longitude. Noon at Greenwich is taken as noon in the British Isles, Portugal, morocco and a part of West Africa. Noon in central Europe is at 1.00 pm. G.M.T.

What is Gyroscope?

Gyroscope is a rotating object that tends to maintain a fixed orientation in space. For example, the axis of the rotation earth always points in the same direction towards the Pole Star. A spinning top or a cyclist is stable when moving at speed because of the gyroscopic effect.

What is parseval’s theorem?

The theorem of Fourier analysis standing that Bessel’s inequality holds as equality for a square integrable function. The term is also applied to extensions of this to any complete orthonormal sequence in a Hilbert space, named after the French mathematician, marc Antoine parseval de chenes, who had to flee France after his publication of poems critical of Napoleon.

What is Fathom?

A unit of length used to measure depth of water. It is equal to 6 feet (1.8288 m)

What is goodness to fit?

The extent to which observed sample values of a variable approximate to value derived from a theoretical distribution.

What is Hamming codes?

A class of efficient error correcting codes, usually binary codes, that all the recipient to diagnose and correct a certain number of transmission errors per word, with the change of a high proportion of errors in negligible.

What is Heuristic?

It is based on trial and error, as for example some technique in iterative calculations.

What is Histogram?

A statistical graph that represents, by the height of a rectangular column, the number of times that each class of result occurs in a sample or experiment.

What is Hypocycloid?

A curve described by a point on the circumference of a circle as it rolls around the inside of another fixed coplanar circle. The form depends on the ratio of the radii of the circles.

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