The North China plain is a flatness which has been formed by the time with the sediments of the Yellow river.
As it was not uploaded an image to indicate where this plain is, a picture from google was chosen for this purpose giving some directions on a map of China.
Answer: The correct answer is : The critical density for the universe is approximately 10 ^ -26 kg / m ^ 3 or you can also say 10 hydrogen atoms per cubic meter.
Explanation: This value is given by:
critical density = 3H ^ 2/2 Pi G, where H is the Hubble constant and G is Newton's gravitational constant.
Critical density is the average density of matter necessary for the universe to stop its expansion but after an infinite time.
Technology is basically a body of knowledge used to create tools, develop skills, and extract or collect materials. Now of course there are many pros and cons of technology. One pro is that it’s gets stuff done faster a con is that some people loose their jobs because a machine can do it so why does a person need to do it.
Answer:
Industrial weapons contributed to staggering casualties and the western front was forced to use trench warfare. In order to prevent a two-front war, General Alfred von Schlieffen drew up a master plan calling for an all-out attack against France.
