2022 AMC10/12竞赛倒计时，AMC历年真题集等你来领！
AMC是美国数学思维活动（American Mathematics Competitions）的简称，是一项面向世界中学生的数学思维训练，目前每年全球有超过6000所学校的30万名学生参加该活动，是当今世界上最科学、最权威、最具信誉度的数...
Edexcel A Level Physics:复习笔记7.4 Electric Field due to a Point Charge
Electric Field due to a Point Charge The electric field strength describes how strong or weak an electric field is at that point A point charge produces a radial field A charge sphere also acts lik...
Edexcel A Level Physics:复习笔记7.3 Electric Force between Two Charges
Electric Force between Two Charges All charged particles produce an electric field around them This field exerts a force on any other charged particle within range The electrostatic force be...
Edexcel A Level Physics:复习笔记7.2 Electric Field Strength
Electric Field Strength The electric field strength at a point is defined as: The force per unit charge acting on a positive test charge at that point The electric field strength can be calculated ...
Edexcel A Level Physics:复习笔记7.1 Defining an Electric Field
Defining an Electric Field An electric field is defined as a region of space in which a charged particle experiences a force Hence, electric fields are a type of force field The charged particle co...
Edexcel A Level Physics:复习笔记6.11 Centripetal Force
Centripetal Force Centripetal force can be calculated using any of the following equations: Centripetal force is always perpendicular to the direction of travel Where: F = centripetal force...
Edexcel A Level Physics:复习笔记6.10 Maintaining Circular Motion
Maintaining Circular Motion An object moving in a circle is not in equilibrium, it is constantly changing direction Therefore, in order to produce circular motion, an object requires a resultant fo...
Edexcel A Level Physics:复习笔记6.9 Centripetal Acceleration
Deriving Equations for Centripetal Acceleration An object moving in uniform circular motion travels with a constant angular velocity and angular speed However, its direction is always changing Ther...
2022年AMC数学竞赛报名即将截止！MIT官网推荐的26个高含金量活动还有哪些？
AMC是美国数学思维活动（American Mathematics Competitions）的简称，是一项面向世界中学生的数学思维训练，目前每年全球有超过6000所学校的30万名学生参加该活动，是当今世界上最科学、最权威、最具信誉度的数...
