Wikipedia.org said: An example is the calculation of the rotational kinetic energy of the Earth. As the Earth has a period of about 23.93 hours, it has an angular velocity of 7.29Ã10â5 rad/s.
Photo Credit Hemera Technologies/AbleStock.com/Getty Images. Himalayan salt is mined from the Khewra Salt Mines in Pakistan, situated at the foothills of the Himalayas. It is the second-largest salt mine in the world, and official records of the Khewra mine date back to the 13th century. The salt obtained from Khewra includes transparent, white, pink, red and dark red salts.
Some 18 miles (29 km) from Mwanzaâs creek-side site, more than 100 men labor at the much larger Kangambala mine. They have spent four months shoveling away 50 feet (15 m) of rock and dirt to expose the diamond-Â­bearing gravel below. None are paid for the labor; they work only for the opportunity to find diamonds.