<span>Disposable razor blades were invented in 1901 by Gillette.
Gillette is a company based in the United States, founded by King C. Gillette in 1901. He was an American businessman who saw the need for disposable razor blades, which is why he is considered the pioneer in the business.
</span>
Answer:
The Middle Ages was a dark phase while the Renaissance was a intelectual and cultural movement
Livres from 1789 were the currencies used during that period. It was the currency of France and it had several types and some existed concurrently. Livre was actually established by a French named Charlemagne and it was used as a unit of account and that was equal to one pound of silver. The word Livre has been derived from the Latin word Libra. Libra is originally a Roman unit for weight measurement. The first Livre that was used was known by the name of Livre Carolingienne.Befor the use of Livre as a currency of France, the denier was used as a commonly used currency.
Answer:
Option (A)
Explanation:
The Ultraviolet lights are referred to as electromagnetic radiation that is comprised of wavelength ranging from 10 nm to about 400 nm (nanometer). The wavelengths of these UV rays are comparatively shorter in comparison to the wavelength of the visible light.
On the other hand, the infrared lights are the radiations that are comprised of wavelength ranging from about 700 nm to 1 mm (millimeter). These infrared lights have a higher wavelength in comparison to the visible light.
Those lights that are comprised of wavelength higher and shorter than the visible light wavelength are not visible to the naked eye. Human eyes respond to the light only between red and violet light of the electromagnetic spectrum.
Thus, the correct answer is option (A).
<span>This is the continuity and stage theory. In this viewpoint, development takes place gradually, with the person getting to a certain level of mastery, staying there for a period, then having breakthroughs that take them to another, higher level of accomplishment. Only after having learned the one tactic does the person become able to learn the next, more complex, step.</span>
