If the earth is aball,why don’It we fall off?The reason (理由)is 1 there is gravity(引力).Gravity is 2 strange force(力).When you slip(滑倒) on something,you never 3 into the air ,but instead,you always fall 4 the ground.Things fall to the earth because the earth pulls them ...
Which of the following statements is NOT mentioned in the passage? A. It takes seven hours to travel from London to New York. B. The earth is moving at a high speed C. Everything on the earth will float away if there's no gravity. D. Everything not attached to the earth would ...
5.Newton's law ofgravity (重力) explains why everything on earth falls to the ground. 试题答案 在线课程 分析牛顿的万有引力定律定律解释了为什么地球上的一切会落到地面上. 解答答案:gravity 考查翻译填空.根据句意及句子结构,要填入名词,gravity意为"重力",是不可数名词. ...
Because..., becausereallybig things like to be round for some reason. Exactly right.And that reason is gravity. 因为……因为非常大的东西通常都是圆的。完全正确。这个原因就是重力。 Think of it this way. Suppose the earth were a cube. Then some points on its surface would be farther away...
Why is gravity so heavy?GravityGravity or the force due to gravity is defined as the product of the masses of two particles over the distance between then. It is mathematically expressed as {eq}F_g = \frac{Mm}{r^2}{/eq} where {eq}F_g{/eq} is the force due to gravity, {eq}M...
He realized (意识到) that there must be some unseen force (力量) pulling the apple towards the ground. He called the force "gravity (地球引力)".Newton then started to watch other things carefully. He learned that the Moon circles the Earth and that planets (行星) go around the Sun. He...
On Earth. gravity(重力)helps a plant's stems and roots to find “up" anddirection.down". However in the space station, there was almostD. It showed the astronauts where to plantno gravity.vegetables.Dr Williams suggested a solution: give the plantsmore light, as plants also use sunlight ...
In fact, the gravity is so strong that it even pulls light into the star! Since all the light is pulled in, none can go out. The star becomes black when there is no light. Then a black hole is born! That’s what we know about black holes. What we don’t know is this: What ...
Gravity constantly pulls things down when it enters the earth’s atmosphere. Why does earth have a gravitational pull? Earth’s have a gravitational pull that keeps us on the ground so we won’t float off in space. What is the earth’s atmosphere made of? earth’s atmosphere has 78% ox...
Two physicists during the nineteenth century both came up with ages for the Sun based on the Sun’s energy coming from [#highlight9]gravitational contraction[/highlight9]. Under the force of gravity, the compression resulting from a collapse of the object must release energy. Ages for Earth ...