Theaverage density of Earthis 5.515 g/cm3. Because theaverage density of surfacematerial is only around 3.0 g/cm3, we must conclude thatdensermaterialsexist within Earth's core.Seismic measurementsshow that the core is divided into two parts, a "solid"inner corewith a radius of ≈1,220 km ...
The average population density of the world is 47 persons per square mile. Continental densities range from no permanent inhabitants in Antarctica to 211 per square mile in Europe. In the western hemisphere, population densities range from about 4 per square mile in Canada to 675 per square mile...
(b)(i))The Earth has an atmosphere which consist of a mixture of air. The average density of air is 1.225 kg m3 and the atmospheric pressure is 1.0 x 105 P a at the Earth's surface.Calculate the height of the atmosphere.p = hpg1.0*10^(-1)=11(1.225)(0.81) h = 8321 m8321...
百度试题 结果1 题目 The average density in the universe is too low that the universe is a weak gravity system。()A.对B.错 相关知识点: 试题来源: 解析 B 反馈 收藏
Density of the Earth [/caption] The density of the Earth is 5.513 g/cm3. This is an average of all of the material on the planet. Water is much less dense than iron, hence an average is needed for ease of use. Earth is the most dense planet in the Solar System; however, if ...
百度试题 结果1 题目The average population density in Britain is___people per square kilometer. A. 237 B. 370 C. 800 D. 500 相关知识点: 试题来源: 解析 B 涉及知识点英国国家概况 null 反馈 收藏
The Earth’s mass is about 5.98 x 1024kg. The Earth has an average density of 5520 kg/m3 (water has a density of 1027 kg/m3). Earth is the densest planet in our Solar System. To escape the Earth’s gravitational pull, an object must reach a velocity of 24,840 miles per hour (...
When the energy density of the earth-ejected spirally sunward-streaming hadron-lepton-mixed matter jets reach a critical level, the jet head(s) can perforate a cluster of vortex-like holes on the surface of the sun’s photoshere which emerge as sunspots, so, even though the sunspots occur...
6.Mercury's average density is 341 pounds per cubic foot, just less than the densest planet, Earth, at 347 pounds per cubic foot. The planet's high density was first discovered by measuring the surprising acceleration of the Mariner mission toward Mercury in the grip of the planet's strange...
The densities of the terrestrial planets average about 5 times the density of water, whereas the Jovian planets have densities that average only 1.5 times the density of water. 问题 句子分析(俗称“长难句分析”)是训练提高基础阅读能力的有效手段。我们通过对托福(TOEFL)、雅思(IELTS)、GRE、考研以及四...