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.
Mount William stone axe quarry. The Mount William stone axe quarry is an Aboriginal archaeological site in Central Victoria, Australia. It is located 9 km northeast of Lancefield, off Powells Track, 10 km north of Romsey and 78 km from Melbourne. Known as Wil-im-ee Moor-ring, meaning 'axe place' in the Woiwurrung language, the greenstone quarry was an important source of raw material for the manufacture of greenstone ground-edge axes, which were traded over a wide area of south-east Australia.