Identify the true statement.
a. strip mining can be done economically down to a depth of abou...
Geography, 22.01.2020 06:32 enrique3300
Identify the true statement.
a. strip mining can be done economically down to a depth of about 1 km.
b. anthracite coal develops at depth along mountain belt borders, where temperatures reach 600°c.
c. underground coal mining is dangerous because of possible tunnel collapse and possible methane gas explosions.
d. coal began to form on the earth soon afterlife evolved in the precambrian.
Answers: 1
Geography, 23.06.2019 00:00
Yo! a girl out ! i will give brainliest! hu one of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.
Answers: 2
Geography, 23.06.2019 00:30
What body of water is the second cataract of the nile river submerged under
Answers: 1
Geography, 23.06.2019 05:40
Which movement developed in the early 1900s and encouraged the nationalist spirit of africans throughout the world? a. african nationalist b. tribalism c. pan-africanism d. african union
Answers: 2
Social Studies, 28.10.2020 20:00
Spanish, 28.10.2020 20:00
English, 28.10.2020 20:00
Mathematics, 28.10.2020 20:00
English, 28.10.2020 20:00
Social Studies, 28.10.2020 20:00
Mathematics, 28.10.2020 20:00
History, 28.10.2020 20:00
Physics, 28.10.2020 20:00