Yahoo 知識+ 將於 2021 年 5 月 4 日 (美國東岸時間) 停止服務,而 Yahoo 知識+ 網站現已轉為僅限瀏覽模式。其他 Yahoo 資產或服務,或你的 Yahoo 帳戶將不會有任何變更。你可以在此服務中心網頁進一步了解 Yahoo 知識+ 停止服務的事宜,以及了解如何下載你的資料。

User
Lv 7
User 發問於 Science & MathematicsPhysics · 4 年前

Recent discovery of negative mass...this is (in one or more respects) tantamount to anti-gravity, isn't it?

Please forgive me if the question is ignorant, but I've not been involved in "real physics" for many decades now.

Recent article describing the creation and observation of negative mass:

http://www.bbc.com/news/science-environment-396429...

Given (quote from the article)

With negative mass, if you push something, it accelerates toward you

That means that acceleration due to gravity would cause a negative-mass object to accelerate in the direction opposite that of the pull of gravity...right? So: any object made of negative mass would act in a gravitational field much as would a positive-mass object in an equal-but-opposite anti-gravity field...right?

So: imagine a space launch vehicle (goal: reach Earth orbit altitude and release payload) made of (room temperature) negative matter. Only fuel for directional rockets required!

1 個解答

相關度
還有問題嗎?立即提問即可得到解答。