Conceptual Physics I, Day 4概念物理I,第4天
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HyperPhysics ***** 物理学 7110 |
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Gravity is one of the fundamental forces. How many kinds of fundamental forces are there? How does gravity compare in strength to the others? 重力是四种基本力之一。已知共有几种基本力?重力与其他基本力相比如何?
How does the gravity force change with distance? 重力如何随距离变化?
How does the gravitational force of the earth on the moon compare with the moon's gravitational force on the Earth? 地球对月亮的引力与月亮对地球的引力相比如何?
How does the gravity force acting toward the center of the Earth cause satellites to go around in orbit? 地球的重力如何使卫星绕地球轨道运行?
What causes the tides? Why are there two per day instead of just one? 潮汐是由什么引起的?为什么每天会出现两次而不是一次?
How do you get a satellite to stay above one point on the earth for communication purposes? 如何使卫星保持在地球上的一个点上方以用于通信目的?
If an object weighs 600 N at the Earth's surface, what will it weigh twice as far out from the Earth's center? ...three times as far out? 如果一个物体在地球表面的重量是600牛顿,那么当它离地球中心两倍远时,它的重量会是多少?……三倍远时呢?
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*Gravity *Fundamental forces *Law of gravitation *Inverse square law *Gravity in orbit *Newton's 3rd Law *Circular motion *Circular orbit *Tides *Sun tide *Jupiter effect *Black hole *Weightlessness *Syncom satellite * 重力 * 基本力 * 引力定律 * 反平方定律 * 轨道中的重力 * 牛顿第三定律 * 圆周运动 * 圆周轨道 * 潮汐 * 太阳潮汐 * 灰色效应 * 黑洞 * 失重 |
Conceptual Physics I, Day 6概念物理I,第6天
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| HyperPhysics*****Physics 7110
HyperPhysics ***** 物理学 7110 |
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