A 选项 “It's rotation”(它自身的旋转),自身旋转并不能解释为什么会减缓,所以 A 选项错误。C 选项 “The Moon's gravity”(月球的引力),月球引力主要影响其周围的物体,比如对地球海洋产生一定的潮汐作用等,但并非是减缓月球自转的原因,所以 C 选项错误。而地球的引力(The Earth's gravity)通过长期的潮汐力...
10 Comments Particle physicist and ex D:Ream keyboard player Dr Brian Cox wants to know why the Universe is built the way it is. He believes the answers lie in the force of gravity. But Newton thought gravity was powered by God, and even Einstein failed to completely solve it. ...
Gravity Is What Keeps the Earth Orbiting the Sun
2. Gravity: It's what keeps us grounded on Earth and makes things fall when we drop them.重力:它让我们在地球上稳稳地立足,也使物体在我们扔下时掉下来。3. Magnetism: Certain objects, like magnets, have the power to attract or repel other objects.磁性:某些物体,比如磁铁,有吸引或排斥其他物体...
The Earth’s atmosphere is held around the planet by the force of gravity. A view of the atmosphere from Chain of Craters Road in Hawaii Volcanoes National Park in Hawaii. Photo:USGS, public domain. Layers of the Atmosphere The Earth’s atmosphere has five main layers and a sixth layer, ...
A. Everything is attached to the earth strongly.B. Everything will float away into space if we turn off gravity.C. Everything on the earth is attracted by gravity.D. The string flies upwards in a circle if you let go off it.2. The word“shoot” underlined in the passage probably ...
Earth's speed in its orbit about the Sun is about 30 km/s. What is Earth's acceleration? What is acceleration due to gravity on the moon? What is the gravitational force of the Sun on the Earth? What is the gravitational force of the moon on the Earth?
What is Gravity?:Gravity is one of the four fundamental forces, alongside electromagnetism, the strong nuclear force and weak nuclear force. Gravity is the force that attracts objects together, and what keeps natural satellites in orbits around planets and planets in orbit around the Sun....
Rain falls from clouds for the same reason anything falls to Earth.The Earth's gravity pulls it.But every cloud is made of water droplets or ice crystal(冰晶).Why doesn't rain or snow fall constantly from all clouds?The droplets or ice crystals in clouds are extremely small.The effect ...
Rain falls from clouds for the same reason anything falls to Earth. The Earth's gravity pulls it. But every cloud is made of water droplets or ice crystal(冰晶). Why doesn't rain or snow fall constantly from all clouds? The droplets or ice crystals in clouds are extremely small. The ...