Which Ancient Greek Showed Earth Is Round And Calculated Its Circumference?

Which Ancient Greek Showed Earth Is Round And Calculated Its Circumference? 240 B.C. Eratosthenes How did they measure the circumference of the Earth? Eratosthenes sent a man to Syene from Alexandria on foot to measure the distance between Alexandria and Syene. Thus, Eratosthenes measured the distance between the two cities is 800 km. He multiplied

What Would Be The Minimum Cross-sectional Area For A Copper Wire?

What Would Be The Minimum Cross-sectional Area For A Copper Wire? Thereby, we conclude that our copper wire must have a minimum cross-sectional area of no less than 64.5 mm^2 and a diameter of no less than 9.062 mm. How do you find the cross-sectional area of copper wire? The cross-sectional area of the wire