【题目】What is gravita-tional waves(引力波)?Scientists havefor the first time ob-served ripples in the fabric of space time(时空涟漪)called gravitational waves, arriving at the earth from a se-verely destructive event in the distant universe. It con-firms a major prediction of Albert ...
Gravity can be described in a variety of ways. Here's how Newton and Einstein took gravity from an observation to a measurable phenomenon.
It pulls you back to the ground when you jump in the air. Without gravity, you would fly into outer space. Gravity pulls everything toward the center of the Earth with a certain amount (数量) of force. This amount of force is called weight. You can find the weight of an object by ...
Albert Einstein called gravity a distortion in the shape of space-time. Photo by Keystone/Getty Images Albert Einstein, who won the Nobel Prize in Physics in 1921, contributed an alternate theory of gravity in the early 1900s. It was part of his famous General Theory of Relativity, and ...
与美国小学生一起学英文 Gravity What happens if you drop a book?Absolutely, it will fall down to the floor. This is called gravity. Gravity pulls from the center of the Earth.So things fall down to the ground because of gravity.Do you know what would happen without gravity?Everything woul...
The human body has adapted to work with gravity straining our body’s every day and without it, we would slowly deteriorate due to the lack of use of muscles. This is the reason astronauts have a time limit on how long they remain in space. Because it is weakening their body, which ...
C Gravity is what keeps you on the ground. It pulls you back to the ground when you jump in the air. Without gravity, you would fly into outer space. Gravity pulls everything toward the center of the Earth with a certain amount of force. This amount of force is called weight. You ...
ng recently?A. Exercising in the gym. B. Working on a project. C. Decorating his office. 15. What is the relationship between the speakers?A. Trainer and client. B. Former workmates.C. Employer a nd employee. 16. Why did the man quit his job?A. For higher salar ...
According to Einstein, gravity is a distortion of spacetime, the fabric of the universe itself. Mass warps space, like a bowling ball creates an indent on a bed sheet, and more massive objects like stars or black holes warp space with effects easily observed in a telescope – the ...
It pulls you back to the ground when you jump in the air. Without gravity, you would fly into outer space. Gravity pulls everything toward the center a scale of the Earth with a certain amount of force. This amount of force is called weight. You can find the weight of an object by...