This chapter discusses the potential and kinetic energy in ecosystems. The upward and downward growth of ecosystems into a thick zone, necessary for intake of CO, water, light, and nutrients and the discharge of vapor and oxygen, endows upper layers more than lower ones with potential energy. ...
Energy is the capacity to do work. ... The unit of energy is J (Joule) which is also kg m2/s2 (kilogram meter squared per second squared)
potential energy 势能 kinetic energy 动能 当球抛向高空时、球具有动能、当球向上飞行到顶点时、球的动能就会转化为重力势能、当球向下落时、球的重力势能就会转化为动能、当球刚刚接触地面时、动能就会转化为重力势能、当球接触地面被压扁时、重力势能就会转化为弹性势能、当球从地面弹起的候、弹性势能...
Kineticenergyandpotentialenergy 4.1能量—另一个守恒量 (Energy—anotherconservativephysicalquantity)2009年11月18日8:00-9:50 4.1能量--另一个守恒量 1 4.1能量—另一个守恒量 人类认识能量和能量守恒定律的过程：经典物理学时代：伽利略：在做功中省力不省功；牛顿时代：运动物体具有某种功效：如...
Kinetic Energy and Potential Energy(1)Kinetic Energy Energy can exist in many forms: heat, light, nuclear energy, chemical energy (from food or fuel), stored (potential) energy (such as the energy stored in a compressed spring) and so on. Energy can be transferred from one form to ...
机械能(Mechanical Energy)是物体的动能与势能之和。 -动能(Kinetic Energy, KE):物体运动产生的能量。12mv2 -势能(Potential Energy)是物体由于高度或位置具有的能量。最常见的是重力势能(Gravitational Potential Energy)。 机械能守恒定律指出: 在一个理想系统(无摩擦和空气阻力)中,若只有重力或弹力做功,则系统的...
Kinetic energy is the energy possessed by an object due to its motion. In this case, a frisbee that is flying through the air is an example of kinetic energy at work because the frisbee is in motion. The ball lodged in a tree and the car in the garage are not in motion, so they ...
The formulas to calculate potential energy and kinetic energy of an object are simple and accurate, but it takes most of us a little practice to get good at it.
1.PotentialEnergy(PE)•theenergythatanobjecthasbecauseofitsposition,shapeorcondition.PotentialEnergyofPosition •PEdependsonanobjectsmass,height,andtheaccelerationduetogravity.PE=mgh KindsofPotentialEnergy •PotentialEnergyofPosition(GravitationalPE)–Figure11,page392:theapplehaspotentialenergythatresultsfrom...
Kineticenergyandpotentialenergy 4.1能量—另一个守恒量 (Energy—anotherconservativephysicalquantity) 力学(Mechanics) 4.1能量—另一个守恒量 人类认识能量和能量守恒定律的过程: 经典物理学时代: 伽利略:在做功中省力不省功; 牛顿时代:运动物体具有某种功效:如运动的子弹可穿入木板; 1686年,莱布尼茨提出:物体“运动的...