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The first constitutive equation (constitutive law) was developed by Robert Hooke and is known as Hooke's law.It deals with the case of linear elastic materials.Following this discovery, this type of equation, often called a "stress-strain relation" in this example, but also called a "constitutive assumption" or an "equation of state" was commonly used.
Robert Hooke FRS (/ h ʊ k /; 18 July 1635 – 3 March 1703) [4] [a] was an English polymath who was active as a physicist ("natural philosopher"), astronomer, geologist, meteorologist and architect. [5]
Robert Hooke published his ideas about the "System of the World" in the 1660s, when he read to the Royal Society on March 21, 1666, a paper "concerning the inflection of a direct motion into a curve by a supervening attractive principle", and he published them again in somewhat developed form in 1674, as an addition to "An Attempt to Prove the Motion of the Earth from Observations". [6]
1660: Hooke's Law (equation describing elasticity) proposed by Robert Hooke (1635–1703). [17] 1666–1675: Theories on optics proposed by Sir Isaac Newton (1642–1726/7); Newton published Opticks in 1704. 1687: Law of universal gravitation formulated in the Principia by Sir Isaac Newton (1642–1726/7).
The Constitution of India is the supreme legal document of India. [2] [3] The document lays down the framework that demarcates fundamental political code, structure, procedures, powers, and duties of government institutions and sets out fundamental rights, directive principles, and the duties of citizens. It is the longest written national ...
The Constitution of India is the longest written constitution for a country, containing 395 articles, 12 schedules, 105 amendments and 117,369 words.. Law in India primarily evolved from customary practices and religious prescriptions in the Indian subcontinent, to the modern well-codified acts and laws based on a constitution in the Republic of India.
In India, semaphore towers were introduced in 1810. A series of towers were built between Fort William , Kolkata to Chunar Fort near Varanasi .The towers in the plains were 75–80 ft (23–24 m) tall and those in the hills were 40–50 ft (12–15 m) tall, and were built at an interval of about 13 km (8.1 mi).
1665: Robert Hooke discovers cells using a microscope. 1665: Portugal defeats the Kongo Empire at the Battle of Mbwila. Taj Mahal, completed by 1653 and commissioned by Shah Jahan, one of the Wonders of the World. 1665–1667: The Second Anglo-Dutch War fought between England and the United Provinces. 1666: The Great Fire of London.