Q:# Who invented the Mercalli scale?

A:### Quick Answer

**Giuseppe Mercalli invented the Mercalli intensity scale in 1902 as a way to measure the effects of an earthquake.** The scale is based off of the observations of the people who experienced the earthquake.

The Mercalli scale originally rated earthquakes on a 10-degree scale, but was later modified in 1904 to have 12 degrees, ranging from instrumental to catastrophic. The scale was rewritten again by geophysicist August Heinrich Sieberg, and was known as the Mercalli-Cancani-Sieberg scale. This scale was modified and translated into English in 1931 by Harry O. Wood and Frank Neumann, and finally improved by Charles Richter. In modern times, it is known as the Modified Mercalli intensity scale. The Mercalli scale measures the effects of an earthquake, and the popular Richter scale measures the energy of an earthquake.

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## Who invented zero?

A:

Full Answer >**Brahmagupta, a Hindu mathematician and astronomer, first used a dot underneath other numbers to represent the number zero in 628 A.D.**He was the first to develop additive and subtractive operations that use zero.Filed Under: - Q:
## Who invented algebra?

A:No single person invented algebra. The roots of algebra extend to the ancient Babylonians, who first developed mathematical techniques to solve problems using algorithms. Later work by Greek, Persian and Indian mathematicians further extended these techniques and laid the foundations for modern algebra.

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## Who invented hockey?

A:Modern ice hockey rules were created by Canadian athlete, journalist and lawyer James George Aylwin Creighton. The first game of modern ice hockey was played in 1875 in Montreal, Canada. Ice hockey likely evolved from field hockey played in Northern Europe.

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## What was invented in 1974 ?

A:Several products and procedures were invented in 1974. One example is the Post-It Note, which was created by American Arthur Fry. Since their invention, Post-It Notes have been sold in over 100 countries across the world and are still used over 40 years later.

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