It is easier to roll a wooden cylindrical barrel instead of pulling it because the friction force of rolling state is much less than the friction force of sliding state. Rolling reduces friction compared to sliding, making it easier to ...
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Walking on snow is more difficult than walking on the road because there is less friction in snow than on the road. The uneven surface and lower friction of snow make it harder to gain traction and maintain stability while ...
Ergot is obtained from Claviceps. It is a genus of fungi that parasitizes various grasses and cereals, particularly rye. Certain species of Claviceps produce alkaloids, including ergotamine and ergometrine, which can cause ergotism when consumed by humans or animals.
Alexander Fleming discovered penicillin. In 1928, while working at St. Mary’s Hospital in London, he observed that a mold called Penicillium notatum inhibited the growth of bacteria in a culture plate. This accidental discovery laid the foundation for the development ...
The continent known by the nickname ‘continent of birds’ is South America. This nickname reflects the continent’s remarkable biodiversity and the abundance of bird species found in its diverse ecosystems, including tropical rainforests, savannas, mountains, and coastal regions.