英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
Hallooing查看　Hallooing　在百度字典中的解释百度英翻中〔查看〕
Hallooing查看　Hallooing　在Google字典中的解释Google英翻中〔查看〕
Hallooing查看　Hallooing　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • What is acceleration? (article) | Khan Academy
    What does acceleration mean? Compared to displacement and velocity, acceleration is like the angry, fire-breathing dragon of motion variables It can be violent; some people are scared of it; and if it's big, it forces you to take notice
  • Acceleration (video) | Motion | Khan Academy
    Acceleration is change in velocity If an object's speed and or direction is changing, it is accelerating If an object is speeding up, its velocity and acceleration are in the same direction If an object is slowing down, its velocity and acceleration are in opposite directions If neither an object's speed or direction are changing, it's moving at constant velocity and its acceleration is zero
  • Learn and try: Connecting motion and forces (article . . . - Khan Academy
    Use a simulation to investigate the effects of balanced and unbalanced forces on an object's motion Explore how an object's acceleration is affected by the net force acting on it and its mass
  • Acceleration (video) | Kinematics (Motion) | Khan Academy
    Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv Δt This allows you to measure how fast velocity changes in meters per second squared (m s^2) Acceleration is also a vector quantity, so it includes both magnitude and direction
  • Acceleration: At a glance (article) | Khan Academy
    We can describe acceleration as the change in velocity over time, and we can use the shorthand equation a = Δ v Δ t to represent this relationship where ‘a’ is the average acceleration, ‘v’ is velocity, and ‘t’ is time The Δ is a Greek symbol that means “change”
  • Gravitational potential energy (article) | Khan Academy
    If g is the magnitude of the gravitational acceleration, we can find the work done by the force on the weight by multiplying the magnitude of the force of gravity, F g , times the vertical distance, h , it has moved through This assumes the gravitational acceleration is constant over the height h
  • Acceleration vs. time graphs (video) | Khan Academy
    David explains how to read an acceleration vs time graph He then shows how the area under the curve gives the change in velocity and does a few examples
  • Learn and try: Projectile motion (article) | Khan Academy
    Use a simulation to explore the motion of a projectile Apply the kinematic equations to objects moving in two dimensions with constant acceleration in each dimension Discover the independence of a projectile's horizontal and vertical motions
  • Newtons second law review (article) | Khan Academy
    Newton’s second law says that the acceleration and net external force are directly proportional, and there is an inversely proportional relationship between acceleration and mass For example, a large force on a tiny object gives it a huge acceleration, but a small force on a huge object gives it very little acceleration Also, force and acceleration are in the same direction
  • Acceleration (video) - Khan Academy
    Acceleration is the rate of change of velocity (a = Δv Δt) The unit for acceleration is m s s, or m s^2 Acceleration is a vector with magnitude and direction If velocity and acceleration point the same direction, the object is speeding up If velocity and acceleration point opposite directions, the object is slowing down Changing direction is also a form of acceleration





中文字典-英文字典  2005-2009