velocity发音
单词:velocity音标:[vi'lɔsəti] 。
速度是矢量。初中的定义:物体在单位时间内通过的路程的多少,叫做速度。(速度在数值上等于运动物体在单位时间内通过的路程) 高中的定义:速度等于位移和发生位移所用时间的比值。
符号:v【注:希腊字母υ表示另一物理量“位移”】 定义式:v=s/t 在国际单位制中,基本单位:米/秒(m/s)Km=1000m 1千米=1公里,物理意义:速度是描述物体运动快慢的物理量。 性质:矢量。国际单位制中,速度的量纲是L*T⁻¹,基本单位为米每秒,符号m/s。 最大值:真空光速c=299 792 458m/s 。
双语例句:
1.Acceleration and velocity are both vectors.
加速度和速度都是矢量。
2.Jaguars can move with an astonishing velocity.
美洲豹跑起来速度惊人。
3.I mean, that's the whole point of escape velocity, right?
我的意思是,这是逃逸速度的全部意义所在,不是吗?
4.Once you have started the boulder rolling, it develops momentum, which is defined by its mass and velocity.
一旦你开始让巨石滚动,巨石就会产生动量,这是由其质量和速度决定的。
5.Simply stated,a gas molecule can "evaporate" from a planet if it reaches a speed known as the escape velocity.
简单地说,如果气体分子达到逃逸速度,它就能从一颗行星上“蒸发”。
6.Finally, scientists measure the star's wobble due to the planet's gravitational tug, known as the radial velocity.
最后,科学家测量了由于行星的引力拖拉而产生的恒星摆动,这就是径向速度。
7.To criticize it for such failure is roughly comparable to criticizing a thermometer for not measuring wind velocity.
批评它的失败,就犹如批评温度计不测风速一样。
8.Responding to changes in the CF echo's frequency, bats of some species correct in flight for the direction and velocity of their moving prey.
有些种类的蝙蝠会根据回声频率的变化来调整向猎物移动的方向和速度。
9.They are the radius of the orbit, the energy of the system and the velocity of the electron, and I am just going to present you the solutions.
它们是轨道的半径,系统的能量以及电子的速度,我接下来给你们展示解法。
10.Wind velocity also increases with altitude and may cause serious stress for trees, as is made evident by the deformed shapes at high altitudes.
风速也随着海拔高度的增加而增加,可能给树木带来严重的压力,这从高海拔地区的变形就可以看出来。