百度试题 结果1 题目What is the force that holds the planets in orbit around the sun? A. Gravity B. Magnetism C. Electricity D. Friction 相关知识点: 试题来源: 解析 A。引力是使行星围绕太阳运行的力。反馈 收藏
What is the force that keeps the planets in orbit around the sun? A. Gravity B. Magnetic force C. Electrical force D. Friction 相关知识点: 试题来源: 解析 A。引力使行星围绕太阳运行。选项 B 磁力不是使行星围绕太阳运行的力。选项 C 电力不是使行星围绕太阳运行的力。选项 D 摩擦力不是使行星...
Gravity An apple falls from a tree. A planet orbits its sun. You labour your bicycle up a hill, and accelerate smoothly down the other side. All those things are down to gravity, working exactly asIsaac Newtonsaid it did almost three and a half centuries ago: a force that tells massive...
of a trampoline. The object would press down into the fabric, causing it to dimple. If you then attempt to roll a marble around the edge of the trampoline, the marble would spiral inward toward the body, pulled in much the same way that the gravity of a planet pulls at rocks in ...
Learn more about this topic: Natural Habitat | Definition, Types & Destruction from Chapter 25/ Lesson 1 153K Learn about natural habitats. Read a natural habitat definition, discover some examples of animals in natural habitats, and explore the types of natural habitats. ...
Gravity is the force that keeps planets in orbit around the Sun. ... Planets have measurable properties, such as size, mass, density, and composition.A planet's size and mass determines its gravitational pull. A planet's mass and size determines how strong its gravitational pull is....
In an open universe, where the density of matter is less than the critical density, there isn't enough gravity to slow the expansion of the universe. Powered by dark energy, the expansion continues to accelerate until the "Big Rip," when even space is torn apart. But in a flat universe...
When the string is swirled around, the tension in that string keeps the rock from flying off in a straight line. That tension points inward, toward the center of the circle. As another example, the sun's gravity provides the centripetal force that keeps the planets rotating around our ...
Our sun is a powerhouse of energy. At four and a half billion years old, this giant creates energy on a humongous scale. In the dense, hot and deep core of the sun, hydrogen is forced together by gravity to create helium, resulting in a small release of energy. This reaction occurs ...
Einstein was correct, gravity is the distortion or warping of space-time, and it is the bodies' mass that determines the magnitude of this distortion. It is an effect rather than a force, which means that as far as I am concerned we will never bo able to isolate a particle which could...