美國留學(xué)STEM專業(yè)有哪些大學(xué)可以選擇？
STEM專業(yè)因?yàn)榧郯l(fā)展?jié)摿Γ澜绺鲊及雅囵B(yǎng)更多相關(guān)專業(yè)人才作為今后發(fā)展的目標(biāo)。中國留學(xué)生中超過40%選擇了STEM專業(yè)。它意味著更多、更好地就業(yè)機(jī)會，以及三年OPT簽證。 美國留學(xué)STEM專業(yè)有哪些大學(xué)可以選擇？...
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8月1日，2022-2023年美本申請Commom App平臺將按承諾開放注冊，這意味著美國大學(xué)申請正式開始，大部分學(xué)生將在未來一段時間內(nèi)經(jīng)歷提前申請，UC申請、常規(guī)申請等階段，直到收獲夢想學(xué)校Offer。在這段時間里，我們...
IB DP Physics: HL復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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...
