Hot answers tagged

3

When comparing the sizes of the two craters, you are confusing how erosion works. Erosion did not shrink the original crater to from 43 miles to 430 meters. The crater was 43 miles across and was completely erased: Nothing of it remains, neither the rim nor the central uplift. In fact, erosion has even erased the rocks into which the crater was blasted. ...


1

This is no an answer per se, just a back-of-the-envelope calculation for fun. Lifting 1 kg (one litre) of water up a height of 1 meter uses 9.8 (let's say 10) joules of energy. Let's say you want to lower the sea level by 1 meter. You need to pump 3.6e17 litres (3.6e14 m2 of ocean area = 3.6e14 m3 to pump * 1000 for litre conversion). Let's say you want ...


1

In opencast mining it is dumped on a huge spoil heap, and if the company is environmentally conscientious or wants to avoid penalties, it is used to fill in the hole left when the mining is finished. With underground mining it is also dumped on spoil heaps, and as it is not practical to infill the mine workings, in best practice the spoil heaps are later ...


Only top voted, non community-wiki answers of a minimum length are eligible