2.876 kelime ve ifade · 21 konu
planet outside our solar system
系外行星；太阳系外行星
interaction that can change motion or shape
力
part of structure transferring loads to ground
基础；建筑基础
motion under gravity without other significant forces
自由落体运动
number of repeated cycles per unit time
频率
contact force opposing relative sliding or its tendency
摩擦力；摩擦
large gravitationally bound system of stars and other matter
星系
large planet composed mainly of hydrogen and helium
气态巨行星
toothed machine part transmitting motion
齿轮
machine converting mechanical energy to electrical energy
发电机
gravitational interaction between physical bodies
引力；重力
operated by liquid pressure or flow
液压的；水力的
resistance to change in velocity
惯性
limit electric current between objects or regions
使绝缘；作绝缘处理
material strongly limiting electric charge movement
绝缘体；绝缘材料
energy associated with motion
动能
optical component redirecting light by refraction
透镜
rigid member turning about a pivot
杠杆
visible electromagnetic radiation
光；可见光
distance light travels in vacuum in one year
光年
carrying structural forces in a design
承重的；承载的
energy emitted by a celestial object per unit time
光度；天体辐射功率
field describing magnetic influence in space
磁场
quantity measuring inertia of an object
质量
relating to machines or physical forces and motion
机械的；力学的
ratio of output force to input force
机械利益；机械增益
sum of kinetic and potential energy
机械能
energy transfer by force along displacement
机械功
mass times velocity in classical mechanics
动量
change of position relative to a reference
运动
number of repeated cycles per unit time
频率
İngilizce tanım the number of complete cycles of a repeating event per unit of time
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