美国留学STEM专业有哪些大学可以选择？
STEM专业因为集聚发展潜力，世界各国都把培养更多相关专业人才作为今后发展的目标。中国留学生中超过40%选择了STEM专业。它意味着更多、更好地就业机会，以及三年OPT签证。 美国留学STEM专业有哪些大学可以选择？...
美本申请Commom App开放，美本申请怎么准备？
8月1日，2022-2023年美本申请Commom App平台将按承诺开放注册，这意味着美国大学申请正式开始，大部分学生将在未来一段时间内经历提前申请，UC申请、常规申请等阶段，直到收获梦想学校Offer。在这段时间里，我们...
IB DP Physics: HL复习笔记6.1.2 Centripetal Force
Centripetal Force An object moving in a circle is not in equilibrium, it has a resultant force acting upon it This is known as the centripetal force and is what keeps the object moving in a circle ...
IB DP Physics: HL复习笔记6.1.1 Circular Motion
Properties of Circular Motion For an object moving in a circle, it will have the following properties: Period Frequency Angular displacement Angular velocity These properties can be inferred from t...
IB DP Physics: HL复习笔记5.4.4 Solving Problems Involving Magnetic Forces
Solving Problems Involving Magnetic Forces There is a lot of mathematics surrounding magnetism and magnetic forces The key equations are: Force on a current-carrying conductor: F = BIL Force on a m...
IB DP Physics: HL复习笔记5.4.2 Magnetic Force on a Charge
Magnetic Force on a Charge Calculating Magnetic Force on a Moving Charge The magnetic force on an isolating moving charge, such an electron, is given by the equation: F = BQv sinθ Where: F = force ...
IB DP Physics: HL复习笔记5.4.1 Magnetic Fields
Magnetic Fields Magnetic Field Definition A magnetic field is a field of force that is created either by: Moving electric charge Permanent magnets Permanent magnets are materials that produce a mag...
IB DP Physics: HL复习笔记5.3.4 Electromotive Force & Internal Resistance
Electromotive Force When charge passes through a power supply such as a battery, it gains electrical energy The electromotive force (e.m.f) is the amount of chemical energy converted to electrical ...
IB DP Physics: HL复习笔记5.3.3 Terminal Potential Difference
Terminal Potential Difference Defining Potential Difference A cell makes one end of the circuit positive and the other negative. This sets up a potential difference V across the circuit The potenti...
IB DP Physics: HL复习笔记5.3.2 Investigating Electric Cells
Investigating Electric Cells Zinc-carbon cells Zinc-carbon cells are the most common type of primary cells, consisting of a zinc casing which acts as the negative electrode a paste of ammonium chlo...
IB DP Physics: HL复习笔记5.3.1 Primary & Secondary Cells
Primary & Secondary Cells Simple Cells A simple cell is a source of electrical energy The simplest design consists of two electrodes made from metals of different reactivity immersed in an elec...
IB DP Physics: HL复习笔记5.2.9 Potential Divider Circuits
Potential Divider Circuits When two resistors are connected in series, through Kirchhoff’s Second Law, the potential difference across the power source is divided between them Potential dividers ar...
