Forming a chemical bond releases energy and therefore is an exothermic process. Exothermic reactions usually feel hot because it is giving heat to you. Endothermic-a process or reaction that absorbs energy in the form of heat. Breaking a chemical bond requires energy and therefore is Endothermic.
karma level 71199. The Seikan Tunnel is a 53.85 km (33.46 mi) railway tunnel in Japan, with a 23.3-kilometre (14.5 mi) long portion under the seabed. Track level is about 140-metre (460 ft) below seabed and 240-metre (790 ft) below sea level. It is the longest undersea tunnel in the world, although the Channel Tunnel between the United Kingdom and France has a longer under-sea portion.
I have given below the longest beach details. There are several beaches which are claimed to be the World's longest, the first being the natural beach at Cox's Bazar, Bangladesh (120kms), is the world's longest natural sea beach (120 km). It is located 152 km south of Chittagong. Other long beaches are -. Fraser Island beach, 90 Mile Beach in Australia.