1. **问题1:** 根据文章第一句话"Newton started to think, 'Why does the apple fall straight to the ground, not to the side or up?'",可知牛顿看到苹果落下时开始思考。所以答案是 C。 2. **问题2:** 根据文章第一段中"He called the force 'gravity
aLegend has it while watching an apple fall from a tree ,Newton ask why ?If what goes up must come down ,then why doesn’t the Moon fall to Earth ? What keeps it up in the sky? 传奇有它,当观看苹果从树时下落,牛顿问为什么?如果什么上升必须下来,则为什么月亮不落对地球? 什么保留它在天...
The planet which has no atmosphere is View Solution Assertion : Two persons on the surface of moon cannot talk to each other. Reason : There is no atmosphere on moon. View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions ...
However, during the daytime, the moon is also in the sky for long periods of time in certain seasons. In these instances, the moon is a faint white color – definitely not yellow. The reason for this is because during the day, the moonlight must also compete with sunlight, and it is ...
Most obviously, it really enhances the fact that our actual moon does not have a name at all. Mars' moons Phobos and Deimos have names, all the planets have names, including exoplanets that only go by their automatically generated ones, and even the sun has a name. We don't call th...
Does the sun exert a gravitational force on the earth? if so, why doesn't the earth fall into the sun? The gravitational force on the Moon due to the earth is only about one half the force on the Moon due to the sun. Why isn't the Moon pulled away from the Earth? Give an exam...
Why does the Moon's appearance change over the course of its cycle of phases?Question:Why does the Moon's appearance change over the course of its cycle of phases?Classification of Moon:The moon is a celestial body that orbits the Earth as it is in the Earth's gravity...
and would be less able to test his pronouncements. And much the greater part of our knowledge is at this level. It does not rest on reasoning or on experiment, but on authority. And how can it be otherwise, when the r...
So what doesan astronomer do? Jonty: Astronomers are like detectives. We sitthere all day looking at clues, trying to work out what stars are like, whatplanets are like. Bri: Ah, so you're looking for clues in thenight sky, to find out about stars and outer space? Jonty: Basically,...
does nothing for him – the most prosaic man to leave the soil of this blue planet says: Hand me a roll of color quick, would you? A beautiful blue marble, swirls of ochre and white, it rolls up over the grey wasteland of the moon. ...