kinetic energy
US /kɪˈnɛtɪk ˈɛnədʒi/
・UK /kɪˈnetɪk ˈenədʒi/
B1 中級
n. (u.)不可數名詞動能
The ball's kinetic energy increased as it rolled down the hill.
影片字幕
多少隻水母能供給東京的電力、下一整天的香蕉雨會生什麼事？一起來看看這些怪奇的科學問題吧！ (What If It Rains Bananas For A Day?)
- A banana falling from about 3,000 meters, the height of a mid-altitude rain cloud, would reach a velocity of 240 meters per second and strike the ground with the same kinetic energy you'd get from dropping a bowling ball off a 50-meter building.
香蕉從大約 3000 米（中空雨雲的高度）的高度落下，速度將達到每秒 240 米，撞擊地面所產生的動能與從 50 米高的大樓上扔下一個保齡球所產生的動能相同。
- A banana falling from about 3,000 metres—the heights of a mid-altitude rain cloud—would reach a velocity of 240 metres per second and strike the ground with the same kinetic energy you would get from dropping a bowling ball off a 50 metre building.
我們在地球上丟棄了超過 11 萬億個這樣的東西。
我們天生就聰明嗎？我不是！ (Are we born smart? I wasn't.)
- For example, if we're looking at kinetic energy, all we're looking at is just a mass with a certain speed,
當大腦能理解概念並將其與現實生活情境連結時，理解得更好。
- and therefore we get kinetic energy.
首先，你可以學習那個公式是怎麼推導出來的主方程式，也就是主方程式，然後
傑龍·安尼斯如何利用雙架勢稱霸拳壇！(Skillr 精彩解析) (Learn HOW Jaron Ennis USES both stances to DOMINATE - (Skillr Breakdown))
- As the opponent punches him, he will roll with it, almost as if he is absorbing their own kinetic energy, and then he will redistribute that force given to him back to the opponent with a quick counter.
當對手出拳時，他會隨之滾動，幾乎就像在吸收對方的動能一樣，然後他會用快速的反擊將對方給他的力重新分配給對方。
- As the opponent punches him, he will roll with it, almost as if he is absorbing their own kinetic energy,
不過，他最令人印象深刻的技能之一是他的身手也很敏捷。
簡單簡諧運動：Crash Course 物理學 #16 (Simple Harmonic Motion: Crash Course Physics #16)
- As the ball compresses and stretches, the spring both kinetic energy and potential energy come into play.
它擁有什麼樣的能量，以及它的最大速度是多少？
- Kinetic energy is the energy of motion,
為了更瞭解球的狀況，我們先來看看它的能量。
烏克蘭如何抵禦「奧列什尼克」等彈道飛彈？ | DW 新聞 (How is Ukraine defend itself against ballistic missiles like the Oreshnik? | DW News)
- but even they can, because of kinetic energy, create enough damage.
如果你想到，即使一枚飛彈就能打擊六個目標，那造成的破壞力就很大了。
- even they can, because of kinetic energy, create enough damage, because, again, we're talking about one missile being capable of striking six targets almost simultaneously, which are widely dispersed, and
即使是假彈頭，因為動能，也能造成足夠的破壞，因為，我們又在談論一枚飛彈幾乎同時能打擊六個目標，而且這些目標分散得很廣，
我們是怎麼決定速限的？ (How Do We Decide Speed Limits?)
- sudden stop at the end. The faster you are going, the data says, the more kinetic energy
車子到最後都會停下來。而資料顯示，你的速度越快，在車內的連結動能
- The faster you're going, the data says, the more kinetic energy is in the vehicle,
以不同速度和不同條件測試道路。注意，每個駕駛
鉛筆能立多久？平衡挑戰極限！ (How Long Can You Balance a Pencil?)
- Well, to start, you'd better get rid of all the air bumping off the sides of the pencil, since the kinetic energy of a typical oxygen molecule is enough to destabilize the pencil (remember, if the pencil gets off center by even 1/10,000th the width of an atom, it'll fall down in under 3 seconds).
事實上 藉由公式運算 能夠預測
- Since the kinetic energy of a typical oxygen molecule,
因為一個氧分子的動能
模擬自然演化！ (Simulating Natural Selection)
- The total energy cost of a creature's movement each time step is equal to the cube of the creature's size times the square of the creature's speed from before, which you might notice is reminiscent of the formula for kinetic energy,
如果能成功，獲得額外的食物來源是很棒的。
- Each time step is equal to the cube of the creature's size times the square of the creature's speed from before, which you might notice is reminiscent of the formula for kinetic energy.
每一個時間步長等於生物大小值的立方乘以先前生物速度的平方，你可能會注意到這讓人聯想到動能的公式。
