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  • Hey there and welcome to Life Noggin.

    嘿,大家好,歡迎收看 Life Noggin。

  • Triangle Bobert snuck into my lab and hit the big red button on the half gravity machine I told him not to go next to.

    Triangle Bobert 偷跑進我的實驗室,並按下我告訴它別靠近的「減半地球重力機器」的大紅色按鈕。

  • I probably should have made the button a little smaller.

    我或許應該把按鈕做得小一點。

  • That's my fault.

    那是我的錯。

  • I was able to reverse everything, but it did have me thinking, what if this happened to your world?

    我能夠翻轉一切,但這的確讓我想到,如果發生在你的世界呢?

  • What if earth only had half its gravity?

    如果地球只有現在一半的重力呢?

  • Well, first off, just what is gravity?

    當然,首先,什麼是重力?

  • In general, we can define gravity as an attractive force that pulls two bodies together.

    通常我們可以將重力定義為將兩個物體吸引在一起的作用力。

  • It's what keeps all of the planets in orbit around the sun and what keeps you from floating off into space.

    這是讓所有行星保持在繞行太陽的軌道上的原因,也是讓你不會飄浮到太空中的力量。

  • And anything with mass has gravity.

    所有有質量的物體都有重力。

  • The more massive something is, the greater gravitational pull.

    物體質量越大,引力越大。

  • So a big, massive planet like the Earth is going to pull you toward it a lot more than one of my small pizza bagels will.

    所以一個大質量的星球,像地球,將你拉向它的拉力比我其中一個比薩貝果還大。

  • Let me just get in here really quick.

    讓我很快地吃一下。

  • Delicious.

    好吃。

  • Distance also matters with gravity.

    距離跟重力也有很大的關係。

  • The closer you are to something, the more gravity is going to draw you toward it,

    你跟某物體距離越近,將你拉向它的重力越大。

  • and the farther away you are, the weaker the gravitational force will be.

    而你離得越遠,重力便越弱。

  • Not only that, but gravity isn't even the same everywhere on Earth.

    不只如此,地求上的重力也不是每個地方都相同。

  • According to NASA and data from the Gravity Recovery and Climate Experiment,

    根據美國太空總署 (National Aeronautics and Space Administration,NASA) 以及重力恢復與氣候實驗室的數據,

  • gravity is ever so slightly stronger over places on Earth with higher concentrations of mass.

    在地球上物質集中的地方重力會稍微強一些。

  • And these concentrations can even change over time.

    而這些物質集中的地點會隨著時間改變。

  • But what would happen if the gravity here on Earth was suddenly cut in half?

    但如果地球上的重力突然減半會發生什麼事?

  • It's pretty hard to tell exactly what would happen, especially since whatever would cause this sudden change would likely have other effects,

    很難精確的告訴大家會發生什麼事,特別是不論什麼原因導致這個現象發生都會有其他的影響在,

  • but if we look at the universe around us, we can get a good idea of what might happen.

    但如果我們看看周遭宇宙萬物,我們可以很好地理解會發生什麼事 。

  • To start off, you'd probably lose a bunch of weight.

    首先,你可能會失去很多體重。

  • That's because our weight isn't actually a constant.

    那是因為我們的體重事實上並非不變的。

  • It changes depending on where we are in the universe since it's determined by how much gravity is acting upon us.

    它會根據我們在宇宙中的地點而改變,體重是由重力作用在我們身上的大小來決定。

  • For instance, if you weigh 100 Newtons on Earth, then you'd only weigh about 17 Newtons on the moon.

    舉例來說,如果你在地球上有 100 牛頓重,你在月球上 只會有 17 牛頓重。

  • That's because up there, you'd only experience about a sixth of the gravity you normally do on Earth.

    那是因為在月球上,你只會感受到地球上 6 分之 1 的重力。

  • So with half gravity, it makes sense that you'd only probably weigh about half as much.

    所以在重力減半的狀況下,你只剩一半體重是有道理的。

  • That, if you survived, and everything on Earth seemed to carry on about the same but just with half gravity,

    如果你存活下來,地球上的一切萬物似乎都會保持不變,

  • there would likely be health consequences.

    但重力減半,可能對身體狀況造成影響。

  • That's because your body is always working against gravity.

    那是因為你的身體一直在對抗重力。

  • Your muscles have to work against gravity even when you're relatively still,

    即使當你靜止不動,你的肌肉仍然在作用以抵抗重力,

  • your bones have to support your weight, which is affected by gravity,

    你的骨骼必須支撐重力影響下的體重,

  • and even your heart has to work against gravity to pump your blood throughout your body.

    甚至你的心臟也必須對抗重力,將血液壓送至你的身體。

  • So at half gravity, and half your weight, your heart would likely become weaker,

    所以在重力減半的狀況下,你的體重減半,你的心臟可能會變得虛弱,

  • your muscles might become smaller, and you could even lose bone mass.

    你的肌肉可能變小,你的骨骼質量也會下降。

  • These are issues that astronauts face when experiencing weightlessness,

    這些是太空人面臨失重時的問題,

  • so with half your weight, it stands to reason that similar things would happen but to a lesser extent.

    所以當你的體重減半,按理說相似的事情就可能會發生,但嚴重性比較小一點。

  • But that's if everything carried on about the same, just with half gravity.

    但那是在所有一切事情都不變只有重力減半的前提下。

  • If we actually suddenly lost half of the gravity on Earth, other things would probably change as a result.

    如果地球真的突然失去一半的重力,其他事情也可能因此改變。

  • One of those things would be escape velocity.

    其中一件事就是逃逸速度。

  • Since the Earth would have less gravity, how fast you would need to go to escape Earth,

    既然地球重力變小,你逃離地球所需的速度,

  • otherwise known as escape velocity, would be less.

    也就是所謂的逃逸速度,就會變小。

  • This means you wouldn't need to go as fast to get off this planet,

    這意味著你不需要用很快的速度就能離開這個星球,

  • which might be a good idea if all this crazy gravity stuff actually happened.

    這可能是個好事,如果重力改變這種事真的發生。

  • Two tickets to Mars please!

    兩張到火星的票,謝謝!

  • I would like to chill with the aliens.

    我想跟外星人去放鬆一下。

  • Let us know in the comment section below what we should talk next!

    在評論區留言讓我們知道下一支影片該討論什麼!

  • Curious to know what it would take for the earth to explode?

    好奇如果要讓地球爆炸需要什麼嗎?

  • Check out this video.

    看看這支影片。

  • It only carved out a chunk of Earth a few kilometers deep.

    它只在地球上劃出幾公里深的區塊。

  • Asteroids that are bigger, denser, or made of different materials could have the ability to hit us with enough power to shatter our planet.

    更大、密度更高或由不同物質組成的小行星有足夠的能力在撞擊後,粉碎我們的星球。

  • As always, my name is Blocko, this has been Life Noggin, don't forget to keep on thinking!

    一如往常,我的名字是 Blocko,這是 Life Noggin,別忘了保持思考。

Hey there and welcome to Life Noggin.

嘿,大家好,歡迎收看 Life Noggin。

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B1 中級 中文 美國腔 重力 地球 體重 物體 質量 物質

如果地球上的重力突然減半?(What If Earth Suddenly Had Half Gravity?)

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    Evangeline 發佈於 2021 年 03 月 09 日
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