The video owner has disabled playback on external websites.
This video is no longer available on YouTube.
This video cannot be played right now.
Watch on YouTube
ابزارهای یادگیری هوش مصنوعی را باز کنید
ثبتنام کنید تا به ابزارهای قدرتمندی دسترسی پیدا کنید که به شما کمک میکنند سریعتر از هر ویدیو یاد بگیرید.
Neutron Stars – The Most Extreme Things that are not Black Holes
آمار یادگیری
سطح CEFR
سختی
زیرنویسها (125 بخشها)
Neutron stars are one of the most extreme and violent things in the universe.
Giant atomic nuclei, only a few kilometers in diameter,
but as massive as stars.
And they owe their existence to the death of something majestic.
[Intro music]
Stars exist because of a fragile balance.
The mass of millions of billions of trillions of tons of hot plasma
are being pulled inwards by gravity,
and squeeze material together with so much force that nuclei fuse
Hydrogen fuses into helium.
This releases energy which pushes against gravity and tries to escape.
As long as this balance exists, stars are pretty stable.
Eventually, the hydrogen will be exhausted.
Medium stars, like our Sun, go through a giant phase,
where they burn helium into carbon and oxygen
before they eventually turn into white dwarfs.
But in stars many times the mass of our Sun,
things get interesting when the helium is exhausted.
For a moment, the balance of pressure and radiation tips,
and gravity wins, squeezing the star tighter than before.
The core burns hotter and faster,
while the outer layers of the star swell by hundreds of times,
fusing heavier and heavier elements.
Carbon burns to neon in centuries,
neon to oxygen in a year,
زیرنویس کامل در پخشکننده ویدیو موجود است
با تمرینها یاد بگیرید
تمرینهای واژگان، گرامر و درک مطلب از این ویدیو بسازید
نظرات (0)
برای نظر دادن وارد شویدثبتنام کن و همه امکانات رو باز کن
پیشرفتت رو دنبال کن، واژگان رو ذخیره کن و تمرین کن
حالت تعاملی
آزمون
پاسخ صحیح:
ویدیوهای مرتبط
Sen. Bernie Sanders - Harnessing Energy From "No Kings" Rally to "Fight Oligarchy" | The Daily Show
Practice SPEAKING English — with Will Smith Movie
Jordan Peterson - The Best Way To Learn Critical Thinking
Carice Van Houten and 'Game of Thrones' Fan Theories | ELLE
Suppandi Learning English | Funny English Class | Animated Story - Cartoon Stories - Funny Cartoons
Kurzgesagt
آزمون
پاسخ صحیح:
آزمونها هنگام تماشای ویدیو ظاهر میشوند
راهنمای حفظ
از این ویدیو
شروع رایگان یادگیری زبان
