Our environment is getting worse and worse now.People throw their garbage here and there.Factories make more and more dirty water that has polluted the rivers and lakes.What should we do?We must find ways to stop pollution.Waste water must be cleaned before it is poured into the river.Peopl...
After a few hours of thought I addressed God, "Ok you win. I ask you to come into my life, and you may do with it whatever you'd like." (It seemed reasonable to me, that since God exists, God had every right to influence and direct my life, if he wanted to.) The next morni...
But the fact is, they do meet. Particles that start off on parallel paths sometimes end up colliding. Newton's theory says this can occur because of gravity, a force attracting those objects to one another or to a single, third object. Einstein also says this occurs due to gravity — bu...
Russia’s multi-tentacled Wagner Group is not just sending mercenaries to Ukrainian. It’s also fighting the West with making slick propaganda films.
That's why we need to look at Einstein's later theory, theGeneral Theory of Relativity, which describes how gravity affects the shape of space and flow of time. Imagine a stretched-out sheet. If you place a bowling ball in the middle of the sheet, the sheet will warp as the weight ...
Astronomers know it exists because something in the universe is exerting a significant gravitational pull on things we can see. When they measure the effects of this gravity, scientists estimate that dark matter makes up to 23 percent of the universe. Baryonic matter accounts for just 4.6 percent...
Make sure that the element has a unique id attribute (if more than one element with the specified ID exists, the first element will be used as the container for the widget). The widget is responsive and will take up all the available width of the element: if necessary, use the style ...
Narrator: We know extreme speeds can send us into the future. 但宇宙中还有另一种力与时间有关,那就是—— But the universe has another force that messes with time -- 引力 gravity. 记住,只有一种东西叫做时空 Remember that there is only something called spacetime, ...
theories are built, ultimately all this proves is that if the moon landingwasfaked, NASA did not make any obvious mistakes. It doesnotdefinitively prove that the Apollo landings actually took place. So, how can we physically confirm, in the present day, that humans actually walked on the ...
To understand why satellites move this way, we must revisit our friend Newton. Newton proposed that a force -- gravity -- exists between any two objects in the universe. If it weren't for this force, a satellite in motion near a planet would continue in motion at the same speed and in...